It's easy to generalize grace, but if we hold on to our biggest secret, our greatest shame, then we block ourselves from experiencing God's grace throughout our lives. But here's the deal... grace is greater than ALL of my sins and secrets. If it wasn't, He would still be dead. There is no sin too big for God to forgive. 

Let us come near to God with a sincere heart and a sure faith, because we have been made free from a guilty conscience.
— Hebrews 10:22