The key word of faith: ENTIRELY

We can put it this way–the man who has faith is the man who is no longer looking at himself and no longer looking to himself. He no longer looks at anything he once was. He does not look at what he is now. He does not even look at what he hopes to be as the result of his own efforts. He looks entirely to the Lord Jesus Christ and His finished work, and rests on that alone. He stops saying, 'Ah yes, I used to commit terrible sins but now I have done this and that.' If he goes on saying that, he has not got faith. Faith speaks in an entirely different manner and makes a man say, 'Yes I have sinned grievously, I have lived a life of sin, yet I know that I am a child of God because I am not resting on any righteousness of my own; my righteousness is in Jesus Christ and God has put that to my account.' 

--D. Martyn Lloyd-Jones