He who throws himself from a mountain and kills himself will be thrown down in the fire of hell and remain in it for ever and ever; he who sips poison and kills himself will have his poison in his hand will sip it for ever and ever in the fire of hell.
That which is lawful is plain and that which is unlawful is plain and between the two if them are doubtful matters about which not many people know. Thus he who avoids doubtful matters clears himself in regard to his religion and his honour, but he who falls into doubtful matters falls into that which is unlawful, like the shepherd who pastures around the sanctuary, all but grazing therein. Truly every king has a sanctuary, and truly Allah's sanctuary is His prohibitions. Truly in the body there is a morsel of flesh which, if diseased, all of it is diseased. Truly it is the heart.