Here's Mgr. Ronald Knox using (in 1927) a visual-perception analogy to point out a change in belief that involves no new data but, instead, seeing old data in a new way:
[S]uddenly, when I’m thinking of something quite different, a game of patience, for example, I see the whole thing in a new mental perspective. It’s like the optical illusion of the tumbling cubes – you know, the pattern of cubes which looks concave to the eye; and then, by a readjustment of your mental focus, you suddenly see them as convex instead. Читать дальше...