St. Gennadius of Constantinople: Do not say, I have sinned much, and therefore I am not bold enough to fall down before God...

Do not say: "I have sinned much, and therefore I am not bold enough to fall down before God." 

Do not despair. Simply do not increase your sins in despair and, with the help of the All-merciful One, you will not be put to shame. For He said, "he who comes to Me I will not cast out." (John. 6:37) And so, be bold and believe that He is pure and cleanses those who draw near to Him. 

If you want to accomplish true repentance, show it with your deeds. If you have fallen into pride, show humility; if into drunkenness, show sobriety; if into defilement, show purity of life. For it is said, "Turn away from evil and do good." (I Pet. 3:11)

St. Gennadius of Constantinople