Faith cannot be given to man. Faith arises in a man and increases in its action in him not as the result of automatic learning, that is, not from any automatic ascertainment of height, breadth, thickness, form and weight, or from the perception of anything by sight, hearing, touch, smell or taste, but from understanding.
Understanding is the essence obtained from information intentionally learned and from all kinds of experiences personally experienced.

All and Everything: Meetings with Remarkable Men (1963)