William Burkitt on Ephesians 5:15

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 circumspectly and unblamedly themselves; such only have authority to reprove, and such only can hope for success in reproving, Rather reprove them: see then that ye walk circumspectly Eph 5:11.

Secondly, The words may be considered as a new precept, added by St. Paul to the former given in this chapter, for directing the Ephesians to an holy life; he assures them, that if they will walk holily, they must walk circumspectly, and that circumspect walking is wise walking.

Observe here, 1. the necessity of circumspect walking: See that ye walk circumspectly.

Learn hence, That it is impossible for a christian to maintain a holy course of obedience to the commands of God, without great care and caution, heedfulness and circumspection; none can walk holily, that do not walk circumspectly and watchfully. Such is that weakness and inconstancy of our nature, so many and so subtle are our spiritual enemies, and so intimate with us, so strict and exact is the law of God we are to walk by, and so holy and jealous is that God we are to walk before, that it is impossible to walk before him acceptably, if we do not walk circumspectly.

Observe, 2. As the necessity, so the excellency of circumspect walking: it is not foolish, unadvised, and unaccountable walking; but it is truly wise walking; such walking as the wisdom of God recommends to us, and such walking as bespeaks us truly and really wise. Such as walk loosely, walk foolishly: careless walking is foolish walking; but circumspect walking is wise walking; for it is to be wise for ourselves, and wise to our best and true interest; it is to be wise for time, and wise to eternity; wise both for time, and wise to eternity; wise both for this, and for the coming world. See that ye walk circumspectly, not as fools, but as wise.