Start by doing what's necessary; then do what's possible; and suddenly you are doing the impossible. – St. Francis of Assisi
Pray that God will give you the courage to simply take the first step. Then, pray for the determination to continue taking steps toward achieving your goals. You will be amazed what you can accomplish with faith and effort.
Brothers, I do not consider that I have made it my own. But one thing I do: forgetting what lies behind and straining forward to what lies ahead, I press on toward the goal for the prize of the upward call of God in Christ Jesus.