There are no whole truths; all truths are half-truths

From Dialogues of Alfred North Whitehead (1954). From the prologue.

There are no whole truths; all truths are half-truths. It is trying to treat them as whole truths that plays the devil.

From Chapter 17.

Intelligence is quickness to apprehend as distinct from ability, which is capacity to act wisely on the thing apprehended.