The Apostle Paul
Ephesians 5:15WEB·traditional attribution

Therefore watch carefully how you walk, not as unwise, but as wise;

Geneva Bible Notes Reformed

See then that ye walk circumspectly, not as fools, but as wise, (4) The worse and more corrupt that the manners of this world are, the more watchful we ought to be in every situation, and give regard to nothing but the will of God.

John Gill Reformed Baptist

Wherefore be ye not unwise,.... No one would be thought to be unwise, but such are, who do not redeem time, and are ignorant of the will of the Lord; believers should not act the unwise part, neither in their talk, nor in their walk and conversation, nor in their use of time: but understanding what the will of the Lord is; or "of God"...

William Burkitt Anglican

These words may be considered two ways; either, 1. As a direction to those, who according to the foregoing exhortation, do reprove sinners for their unfruitful works of darkness, namely to walk very circumspectly themselves. "See then how circumspectly you walk," so the words may be rendered; and it intimates to us, that those only are fit to reprove sin in others who walk very...