And if, "He need not have gone," is a correct expression, need is clearly proved to be an auxiliary, and the three words taken together must form the potential perfect.

We shall now endeavour to establish the following proposition: namely, that the Pleasures in question have their true source in One Intuitive Universal Principle or living Power, and that the three Ideas of Beauty, Truth, and Holiness, which we assume to represent the perfect in the physical, intellectual, and moral worlds, are but the several realized phases of this sovereign principle, which we shall call Harmony.