The frames our minds create define—and confine—what we perceive to be possible. Every problem, every dilemma, every dead end we find ourselves facing in life, only appears unsolvable inside a particular frame or point of view. Enlarge the box, or create another frame around the data, and problems vanish, while new opportunities appear.
– Rosamund and Benjamin Zander, The Art of Possibility, p. 14
(Hat tip to James Clear for making me remember about this excellent book.)