[42] Spinoza, Ethics, II, 49, Scholium; Hume, Human Understanding, Part III, Section VII ff.; Dugald Stewart, Elements of the Philosophy of the Human Mind, Vol. I, Ch. III; Taine, On Intelligence, Part II.
[43] James, The Will to Believe and Other Essays, p. 10.
[44] Payot, De la croyance, 139 ff.
[45] B. Perez, Les trois premières années de l'enfant, p. 323.
[46] Sully, op. cit., pp. 59-61. Compayré, L'évolution intellectuelle et morale de l'enfant, p. 145.
(Some time ago the writer was riding on a train, when the engine, for some reason or other, began to slow up, jerking, puffing, almost groaning, until it finally came to a full stop. The groaning continued. A little girl of about three called to her mother, "Too-too sick, too-too sick," and when finally the train started on again, the child was overjoyed that "too-too" was well again. (Tr.))
[47] Sully, op. cit., p. 164.