The three principles of Stoicism, Epicureanism and Scepticism are necessary; in the first there is the principle of thought or of universality itself, but yet determined in itself; the abstract thought is here the determining criterion of the truth. There is opposed to thought, in the second place, the determinate as such, the principle of individuality, feeling generally, sensuous perception and observation. These two form the principles of the Stoic and Epicurean philosophies. Both principles are one-sided and, as positive, become sciences of the understanding; just because this thought is not in itself concrete but abstract, the determinateness falls outside of thought and must be made a principle for itself; for it has an absolute right as against abstract thought. Besides Stoicism and Epicureanism, there is, in the third place, Scepticism, the negation of these two one-sided philosophies which must be recognized as such. The principle of Scepticism is thus the active negation of every criterion, of all determinate principles of whatever kind they be, whether knowledge derived from the senses, or from reflection on ordinary conceptions, or from thought. Thus the next result arrived at is that nothing can be known. Yet the imperturbability and uniformity of mind in itself, which suffers through nothing, and which is affected neither by enjoyment, pain, nor any other bond, is the common standpoint and the common end of all these philosophies. Thus however gloomy men may consider Scepticism, and however low a view they take of Epicureanism, all these have in this way been philosophies. A. THE PHILOSOPHY OF THE STOICS.