Psalm 119:66-67

Teach me good judgment (discernment) and knowledge, for I have believed and trusted and relied on Your commandments.  Before I was afflicted I went astray, but now I keep and honor Your word (with loving obedience).

The blessing of good judgement saves us from a drive through the ditch.  Sometimes, we are not keeping up our faith and temporarily slip and can see the cost our lack of diligence does to our lives.  There is nothing better on this earth than being connected to Jesus and guided by faith.  When we keep that knowledge in front of us, we learn to keep in close contact with God.