What does it mean that a city on a hill cannot be hidden (Matthew 5:14)?

The depth of the meaning of the word "light" was certainly not yet known to the disciples when the Lord said to them: "Ye are the light of the world," but they could understand that He meant their testimony in the world. While salt works invisibly and internally, light is visible afar off.

"A city that is set on an hill cannot be hid." Whether an enemy was planning an attack or a traveller was seeking accommodation, a city on a hill in Israel would be visible for everyone-during the day by the bright shining of its white walls and buildings, and by night by the lights of the houses. Thus the walk of the disciples of the Lord ought to be a light in this world, seen by everyone.

The depth of the meaning of the word “light” was certainly not yet known to the disciples when the Lord said to them: “Ye are the light of the world,” but they could understand that He meant their testimony in the world. While salt works invisibly and internally, light is visible afar off.

“A city that is set on an hill cannot be hid.” Whether an enemy was planning an attack or a traveller was seeking accommodation, a city on a hill in Israel would be visible for everyone — during the day by the bright shining of its white walls and buildings, and by night by the lights of the houses. Thus the walk of the disciples of the Lord ought to be a light in this world, seen by everyone.

"Ye are the light of the world." This is another thing. Bearing in mind the distinction drawn in the series of the beatitudes and of the persecutions, we have the key to these two verses. The salt of the earth represents the righteous principle. This evidently involves the clinging to the eternal rights of God and the maintenance before the world of what is due to His character; but it is gone when that which bears the name of God falls below what even men think proper, and they scoff against what is called religion. All respect vanishes, and men think that the condition of Christians is a fair subject for ridicule. But now, in verse 14, we have not only the principle of righteousness, but of grace — the outflowing and strength of grace. And here we find a new title given to the disciples, as descriptive of their public testimony — 'the light of the world." The light is clearly that which diffuses itself. The salt is what ought to be inward, but the light is that which scatters itself abroad. "A city that is set on a hill cannot be hid." There was to be a diffusion of its testimony around. Man does not light a candle to put it under a corn measure, but on a candlestick, "and it giveth light unto all that are in the house." After this manner let your light shine before men, "that they may see your good works, and glorify your Father which is in heaven." Mark it well.

We have looked at these two striking sketches of the testimony of believers here below as the salt of the earth, the preservative energy in the midst of profession; and as the light of the world going out in the activities of love toward the poor world; and the danger of the salt losing its savour, and of the light being put under a bushel. Now we find the great object of God in this twofold testimony. It is not merely a question of the blessing of souls, for there is not a word about evangelizing or saving sinners, but of the walk of saints. There is a grave question that God raises about His saints, and this is about their own ways apart from other people. Calls to the unconverted we find abundantly elsewhere, and none can exaggerate their importance for the world; but the sermon on the mount is God's call to the converted. It is their character, their position, their testimony distinctively; and if others are thought of throughout, it is not so much a question of winning them, as of the saints reflecting what comes from above. This light is what comes from Christ. It is not, Let your good works shine before men. When people talk about this verse thinking of their own works, they are generally not good works at all; but even if they were, works are not light. Light is that which comes from God, without admixture of man. Good works are the fruit of its action upon the soul; but it is the light which is to shine before men. It is the confession of Christ that is the point before God. It is not merely certain things to be done. The light shining is the great object here, though doing good ought to flow from it. If I make doing good everything, it is a lower thought than that which is before the mind of God. An infidel can feel that a shivering man needs a coat or a blanket. The natural man may be fully alive to the wants of others; but if I merely take these works and make them the prominent aim, I really do nothing more than an unbeliever might. The moment you make good works the object, and their shining before men, you find yourself on common ground with Jews and heathen. God's people are apt thus to destroy their testimony. What so bad, in the way of a thing done professedly for God, as a work that leaves out Christ, and that shows a man who loves Christ to be on comfortable terms with those that hate Him? This is what the Lord warns the saints against. They are not to be thinking about their works, but that the light of God should shine. Works will follow, and much better works than where a person is always occupied with them. "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven " (ver. 16). Let your confession of what God is in His nature and of what Christ is in His own person and ways — let your acknowledgment of Him be the thing that is felt by and brought before men; and then, when they see your good works, they will glorify your Father which is in heaven. Instead of saying, What a good man such a one is, they will glorify God on his behalf — connecting what you do with your confession of Christ.

On the other hand, as the light of the world we are the reflection of Christ (Jn.8:12). Our testimony to Him is not to be hid. As a city set on a hill, the disciples formed a company above the common level of the world, and as such will necessarily draw the attention of the world. A lamp too is not to be put under a bushel measure, that is, obscured by that which speaks of man's work. Let us not allow our work to get in the way of the light of Christ, who is the only source of light for darkened men. The lamp set in its proper place will give light to all who are in its Vicinity.

But are we not responsible as "the light of the world"? If it is not the property or power of salt to cure corruption, it is for light to illuminate the dark. It goes out and around. And we may notice it is to "the world" at large here in this appropriate diffusion by grace, as the salt is "of the earth," the ordered scene of privileges. As being the light, it is compared to a city set on a hill and not to be hid; and not this only, but as penetrating the home, it is as a lamp (not absurdly under the bushel as its extinguisher, but) upon its stand, that all in the house may enjoy its brightness.

Only let us not forget the Lord's momentous caution as to this. "Thus let your light (your living profession of Him, Who is the true Light and made you light in Him) shine before men, that they may see (not your inconsistencies, but) your comely works, and glorify your Father that is in the heavens." He means the very reverse of men displaying their benevolent works before their fellows, so as to bring glory to themselves. He would have His own let their confession of Him, the one source of their light, shine, so that men may see the goodly fruits, and therefore glorify not the disciples but our Father in the heavens, the Father of lights, of whom is every good giving, and whence comes down every perfect gift from above.

This is confirmed by the figure which follows and carries the truth out farther. "A city set, or situated, upon a hill-top cannot be hid." The sphere is no longer the circumscribed area of the earth or land, but, as for another aspect we read, "the field is the world." The God and Father of the Lord Jesus Christ would make Himself known at least in testimony, before power effectuates His will far and wide. As perfect love He came down in Christ to man; but the world knew Him not, and His own people received Him not, yea insisted that He should be crucified. Now He sets Christ in the heavenlies above every principality and authority and power and every name that is named, not only in this age but also in that to come, and put all things under His feet, and gave Him as head over all things to the church which is His body, the fulness of Him that fills all in all. And they, His disciples, are the light of the world: a city set upon a hill-top cannot be hid. Once darkness, they are now light in the Lord, and responsible to walk as children of light, corporately as well as individually. For the fruit of light is in all goodness, and righteousness, and truth. They are to prove what is agreeable to the Lord, and to have no fellowship with the unfruitful works of darkness but rather to reprove them.

Here the character of the position for the disciples goes beyond "the salt of the earth." For this was expressive of righteousness; a righteousness not outward like that of the scribes and Pharisees (which sought reputation of man, and was little beyond the pride of a Stoic), but lowly and real as in God's sight. Whereas "the light of the world" is the shining forth of grace, and inseparable from the confession of Christ in that respect. Salt preserves, but does not make everything manifest as the light does.

"Ye are the light of the world: a city set upon a hill-top cannot be hid. Nor do they light a lamp, and put it under the dry measure but on the lamp-stand, and it shineth unto all that are in the house. Thus let your light shine before men, so that they may see your good works, and glorify your Father that is in the heavens" (vers. 14-16).

The salt of the earth is a different thing from the light of the world. The earth, it appears to me, expresses that which already professed to have received light from God — that which was in relationship with Him by virtue of the light — having assumed a definite shape before Him. The disciples of Christ were the preservative principle in the earth. They were the light of the world, which did not possess that light. This was their position, whether they would or no. It was the purpose of God that they should be the light of the world. A candle is not lighted in order to be hidden.

You will observe what a simple injunction this is. We are instructed to let our light shine. Unquestionably, the main function of light is to shine. We are enjoined to let it do so. Unless the light is covered by a bushel or concealed under the bed it will shine with usefulness. Place the lamp on its stand, and it will shed light to all that are in the house. Even so, said the Lord, let your light shine before men. It is as if He had said, You have your light; take care to allow no obstruction to interfere with the diffusion of its radiance around you.

Like the city on the hill, the light should be visible to everyone. "Let your light so shine before men." This light is the disciple's confession of his Lord. By this it becomes evident to whom he belongs. Let us therefore confess Christ everywhere and in all circumstances. When we go out to a restaurant, do we confess by giving thanks before the meal without embarrassment, that we belong to Him, even if those at other tables continue their conversations loudly or show their disdain? Sometimes unbelievers ask for our opinions regarding worldly entertainments like the cinema, theatre or discotheque, or on topics such as homosexuality, relationships outside marriage or abortion. Do we then confess the Lord, or do we give evasive answers?