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

by Arthur Schopenhauer

"Were not the thought so cursedly acute,

One might be tempted to declare it silly."

Schiller, "Wallenstein-Trilogie. Piccolomini," Act ii. Sc. 7.

[27] Aristot., "Analyt. post." c. 7.

[28] Spinoza, "Eth." i. prop. 11.

[29] Spinoza, "Eth." P. 1. prop. 8, schol. 2.

[30] Ibid. Prop. 16.

[31] Ibid. Prop. 36, demonstr.

[32] Ibid. Prop. 18.

[33] Ibid. Prop. 25.