Look carefully then how you walk, not as unwise but as wise,
Paul has just finished telling us to not partner with those who walk in darkness. We are to walk in the light, for the light exposes the darkness.
But we live in a world of darkness. Sometimes the darkness is think all around us, even in our churches. So this verse becomes important, because it reminds us to beware of how we walk. Don't get caught up in the games of those around you, but stay grounded in the light of God's word. Verse 16 goes on to say,
making the best use of time, because the days are evil.
I think it is easy to get caught up in the ways of those around us. Their avoidance, paranoia, fear, etc. We live in an evil age. No, not just the 21st century, but the age of mankind since the fall.
The Bible's message is clear, I am a sinner in need of a Savior. There are those who do not like this, don't think it will sell well, and who will water it down or even change it. Sometimes they do it out of fear, other times out of selfish motives. Either way, it is a part of the evil days we live in. Verse 17 continues,
Therefore, do not be foolish, but understand what the will of the Lord is.
Stay grounded. Stay in the word. Live the gospel. God's will is not that I save anyone, and that is a good thing, because I can't save anyone, only God can do that. Understand what God's will is. Understand that His will is for me to love Him, and to serve Him out of that love. If I can focus on that, I will be doing well.