He also said: “They argue: ‘If existence were the basis for the visibility of things, it would be possible for us to see tastes and knowledge, which is self-evidently false.’ We reply: ‘An appeal to self-evidence on a disputed point is unacceptable.’”

He also mentioned that his opponents on the question of seeing Allah claim to know self-evidently that vision necessarily occurs when the full set of conditions is fulfilled and is impossible in their absence. These conditions are that the faculty of sight is sound; the object to be seen is present, neither too close nor too distant, neither exceedingly small nor subtle; no thick barriers stand between the object and the observer; and the object faces the observer or occupies an equivalent position. They sometimes claim that rational people possess this self-evident knowledge after