Hate sin perfectly and perpetually and then you will not spare it but kill it presently. Till sin be hated it cannot be mortified; you will not cry against it, as the Jews did against Christ, Crucify it! Crucify it! but shew indulgence to it as David did to Absalom and say, Deal gently with the young man, -- with this or that lust, for my sake. Mercy to sin is cruelty to the soul.