As Christians who look back into the OT, all of the mysteries are revealed to us. Christ is the answer. The OT is about Christ. Don't look at the OT as the means to earn your righteousness. Look at it as the means to deepen your love and obedience to Christ.

What do you call a person who freely gives up their Queen in chess? You call them the same thing that you call a Christian who doesn't pray. Crazy! That's because prayer is the Christian's advantage in this world. To give that up is to give up a fruitful, joyful, and exhilarating life. To give up prayer is to give up the catalyst to align oneself with the will of God.