On the Fourfold Root of the Principle of Sufficient Reason, and On the Will in Nature: Two Essays (revised edition)

by Arthur Schopenhauer

[267] Plato, "Phæd." p. 319 Bip.

[268] "That which is moved by itself and that which is moved from outside." [Tr.] And we find the same distinction again in the 10th Book "De Legibus," p. 85. [After him Cicero repeats it in the two last chapters of his "Somnium Scipionis." Add. to 3rd ed.]

[269] "All that is moved, is moved either by itself or by something else." [Tr.] Aristotle, "Phys." vii. 2.

[270] Maclaurin, too, in his account of Newton's discoveries, p. 102, lays down this principle as his starting-point. [Add. to 3rd ed.]

[271] Émile, iv. p. 27. Bip.

[272] Burdach, "Physiologie," vol. iv. p. 323.

[273] Seneca, "Epist." 81.

[274] Ibid. "Quæst. nat." ii. 24.

[275] Plin. "Hist. nat." 37, 15.

[276] Aristot. "De Cœlo." ii. c. 13, "If a small particle of earth is lifted and let loose, it is carried away and will not rest." [Tr.'s add.]