If the first inward thought is not warded off, it will generate a desire, then the desire will generate a wish, and the wish will generate an intention, and the intention will generate the action, and the action will result in ruin and divine wrath. So evil must be cut off at its root, which is when it is simply a thought that crosses the mind, from which all the other things follow on.
Al-GhazaliUnderstand that for every rule which I have mentioned from the Quran, the Devil has one to match it, which he puts beside the proper rule to cause error.
Al-GhazaliNo one who possesses snow would find any hardship in exchanging it for jewels and pearls. This world is like snow exposed to sun, which continues to melt until it disappears altogether, while the next life is like a precious stone that never passes away.
Al-Ghazali