Conviction That I Lack O.T. Knowledge

I am convicted that I lack knowledge of the Old Testament. God saw fit to give us a historical account of His dealings with Israel of old. I have heretofore made an unconscious decision in the course of my sanctification to minimally study the O.T. There are so many treasures that abound in the O.T. Just recently I listened to a message by Matt Chandler where he defended the total sovereignty of God out of a text in Isaiah. (Isaiah 46:8-13) Why is it that I have so neglected such a rich blessing that God has given us?