 For to ask whether a man is at liberty to will either motion or rest, speaking or silence, which he pleases, is to ask whether a man can will what he wills, or be pleased with what he is pleased with? A question which, I think, needs no answer; and they who make a question of it must suppose one will to determine the acts of another, and another to determine that, and so on in infinitum. (Locke 1690 [1975] II.xx.25; cf. Hobbes 1656 [1999], 72)