Dietrich Bonhoeffer said this quote
“ The real difference in the believer who follows Christ and has mortified his will and died after the old man in Christ, is that he is more clearly aware than other men of the rebelliousness and perennial pride of the flesh, he is conscious of his sloth and self-indulgence and knows that his arrogance must be eradicated. Hence there is a need for daily self-discipline. ”