Leslie M. Grant · Comments on the Gospel of Matthew

In verse 16 the light is distinct from good works, but both are closely connected. The light speaks of moral and spiritual testimony to Christ. The good works are works that back up this testimony as being real. Apparent good works by themselves would draw attention to the person who does them, that he might be honored; but if the light of testimony for Christ accompanies the good works, this influences others to recognize that God our Father is the source of the works and therefore to glorify Him in heaven, the place of highest authority.