1 John 1:9

The Master said, "To have faults and not to reform them,—this, indeed, should be pronounced having faults."

He that covereth his transgressions shall not prosper; But whoso confesseth and forsaketh them shall obtain mercy.

If any one does evil or wrongs his own soul but afterwards seeks Allah's forgiveness, he will find Allah Oft-forgiving, Most Merciful.

Although His thrall shall miss the road and err, / ’Tis but to teach him wisdom through distress, / Else Pardon and Compassionate Mercy were / But empty syllables and meaningless. …

He who formerly was reckless and afterwards became sober, brightens up this world, like the moon when freed from clouds. He whose evil deeds are covered by good deeds, brightens up this world, like the moon when freed from clouds.

When the hands and the feet and the body are dirty, water can wash away the dirt. When the clothes are soiled and stained by urine, soap can wash them clean. But when the intellect is stained and polluted by sin, it can only be cleansed by the Love of the Name.

Tao has of all things the most honoured place. No treasures give good men so rich a grace; Bad men it guards, and doth their ill efface. … Why was it that the ancients prized this Tao so much? Was it not because it could be got by seeking for it, and the guilty could escape (from the stain of their guilt) by it? This is the reason why all under heaven consider it the most valuable thing.

By repenting of one's sins to oneself the soul obtains repentance, and becoming indifferent by repentance he prepares for himself an (ascending) scale of virtues, by which he destroys the Karman resulting from delusion. By repenting of one's sins before the Guru the soul obtains humiliation; feeling humiliated, he will leave off all blameable occupations, and apply himself to praiseworthy occupations, …