أما تراك تعتقد في النوم أموراً ، وتتخيل أحوالاً ، وتعتقد لها ثباتاً واستقراراً ، ولا تشك في تلك الحالة فيها ، ثم تستيقظ فتعلم أنه لم يكن لجميع متخيلاتك و… - Al-Ghazali

"Another dangerous property of worldly things is that they at first appear as mere trifles, but each of these so-called "trifles" branches out into countless ramifications until they swallow up the whole of a man's time and energy. Jesus (on whom be peace!) said, "The lover of the world is like a man drinking sea-water; the more he drinks, the more thirsty he gets, till at last he perishes with thirst unquenched.

There is no denying existence itself. Something must exist and anyone who says nothing exists at all makes a mockery of sense and necessity. The proposition that there is no denying being itself, then, is a necessary premise. Now this Being which has been admitted in principle is either necessary or contingent… What this means is that a being must be self-sufficient or dependent… From here we argue: If the being the existence of which is conceded be necessary, then the existence of a necessary Being is established. If, on the other hand, its existence is contingent, every contingent being depends on a necessary Being; for the meaning of its contingency is that its existence and non-existence are equally possible. Whatever has such a characteristic cannot have its existence selected for without a determining or selecting agent. This too is necessary. So from these necessary premises the existence of a necessary Being is established.

If you were to show a piece of intelligible writing to a reasonable person and say to him: 'do you know its writer?' and he said 'no', he would be speaking truly. But if he said 'yes: its writer is a man living and powerful, hearing and seeing, sound of hand and knowledgeable in the practise of writing, and if I know all this from [the sample] how can I not know him?-he too would be speaking truly. Yet the saying of the one who said 'I do not know him' is more correct and true, for in reality he has not known him. Rather he only knows that intelligible writing requires a living writer, knowing, powerful, hearing, and seeing; yet he does not know the writer himself. Similarly, every creature knows only that this ordered and precisely disposed world requires an arranging, living, knowing, and powerful maker.