Verse 13 encourages us to understand that God is purposely exposing our sins to us for our eternal good so that we might share life in His Kingdom with Him. Therefore, He urges us in verses 14-17 to wake up and take advantage of this, for if we continue in sin, we are as good as dead. But because it is His desire to save, He exposes our sins to us so that we can repent.
Doing our part by overcoming is necessary if we want to experience the fullness of our redemption from sin. We must take advantage of the great gift of His Spirit, using every opportunity that comes our way to confront our weaknesses and drive on to perfection. He implores us not to let what has made us special to Him slip from our grasps.
Thus, in verse 17 especially, He urges us to follow wisdom through clearly understanding His will for us. He wants us in His Kingdom, experiencing life as He lives it, but a measure of responsibility for responding in submission falls directly on our shoulders. We know what we must do—we must take the time and make the effort to take advantage of our uniqueness before Him. Time is running out, so let us do it!