If a baseball player can reach base with a hit in 3 out of 10 times, he is an All-Star, making millions upon millions of dollars a year. Your coach will not expect, although he certainly hopes, for you to drive the runner in.
A priest at my church has a go-to phrase, and it has stuck with me, even at my points of religious apathy, and it goes like this: "Saints are sinners that keep on trying." It's a powerful statement. To think that perhaps Mother Theresa slipped up every once and a while is comforting.
And then there's guilt. The despair of looking yourself in the mirror can be overwhelming. Guilt often lead to compound failures for me during my initial days of striving for chastity. I would think, "Well I screwed up just now, there's no use in trying anymore." It's tough to think of yourself as a child of God striving to be like Christ fresh off a bone-head mess up.
But through guidance of people who dearly loved me, I began to understand a certain notion. As a kid, how many times did you not do your chores? Or go directly against your parent's wishes. If I had a nickel for each I would be giving Bill Gates a run for his money. But the amazing thing is, my parents still want a kiss every time I leave the house, or get choked up each time I depart for college. They still love me! Sure they got upset, I learned my lesson, and soon enough I stopped. They knew an instillation of cleanliness and obedience was the best for me.
God is the ultimate parent. He loves you more than you can even imagine. It's amazing that you'll never understand until you are immersed in it once you work into Heaven (Yes, Work!). News flash! Don't be guilty! He has infinite forgiveness and he wants nothing more than for you to succeed. Through Confession and your penance, you are expected to learn your lesson.
Inside your head, each and every time face yourself towards the Devil, understand that if you want to get better, you will, because God never gives up on you. And unlike athletics, you'll never be benched. You are the quarterback, catcher, point guard, and goal tender.
Never give up. Compete.