Psalm 64

There are many aspects regarding the nature of God that are mysterious to us. His ways and thoughts are so far beyond our abilities that if words existed to adequately describe that part of God we still couldn't grasp them. And since we are made in God's image there are parts of our lives that are mysterious as well. What moves our emotions and our thoughts are mysterious to other people.  David was baffled by those who sought his life. I am baffled by those who reject the Gospel story. I know people who are baffled by the way that I think. So David was accurate; "the heart and mind of man is a mystery." (Verse 6)
Stuart