Even a person with a bad conduct who becomes a devotee of God is worth being considered a saint. This is because he has decided that God is the supreme power, the omniscient, the always generous, the master of all, the only one who can destroy all your sins and it is the duty of a human being to serve God. This the most significant decision he has made in life. Even though he may not have been able to leave all his bad practices he would eventually. Devotion to God would purify his being and take him away from the temptations. One who is God's devotee is always uplifted in life and never has a downfall. This is illustrated by the story of Bilvamangal.