Faith is completely crazy, except when faith is in God. Thoreau said, "The mass of men lead lives of quiet desperation." These are the men who will not walk in faith. These are the mass of people who walk by the flesh and never see the joy that God promises.
Faith is not about us trying harder with God. It is RESTING in what God has done, and staking your future on it. When we walk in faith, we will have peace instead of turmoil. We will have rest instead of striving. It is a release that is initially scary, but results in joy like never before.