Want of Faith is a great sin. Faith is a purifier of sins. Like a snake casting off its slough, the man of Faith succeeds in shaking off all his sins.
अश्रद्धा परमं पापं श्रद्धा पापप्रमोचिनी। जहाति पापं श्रद्धावान् सर्पो जीर्णामिव त्वचम्॥