[15] Essai sur l'Origine des Connaissances. Première partie, C. 1., § 1.

[16] Transcendental Logic, B. ii., C. 2, Sect. 1, pp. 140-141. Ed. Leipsic. 1828.

[17] Critic of Pure Reason. Introduction, Sect. 4. p. 9.

[18] Summa Theologica. P. 1a, Q. 2a, A. 1o, in corp.

[19] 1a 2dae, Q. 94a, A. 2o, in corp.

[20] P. 1a, Q. 25a, A. 3.

[21] Wissenschaftslehre. Erster Theil. § 3.

[22] Part II., Chap. II., Sect. 3, § 2, pages 436-7.

[23] Critik der reinen Vernunft. Einleitung.

[24] Ibid. pp. 9, 10.