"Who can say, "I have made my heart clean, I am pure of my sin"?  " - Proverbs 20 V9

"The heart is deceitful above all things, and desperately wicked; who can know it?" - Jeremiah17 V9

No matter how much one tries, all efforts to make oneself pure is pointless. Christ is the only way and only through Christ shall we be represented sinless before the Father. The heart is deceitful and wicked, let us trust Christ in leading us to heaven and not our works.