When we think of the three elements or stages, knowing, feeling, striving, as all being necessary factors in any complete bit of human behaviour, we no longer try to arrange them in a hierarchy with knowing or reason at the head. Knowing--that is, receiving and recognizing a stimulus from without--would seem to come first; we must be acted on before we can _re_-act; but priority confers no supremacy. We can look at it another way. Perceiving is the first rung on the ladder that leads to action, feeling is the second, action is the topmost rung, the primary goal, as it were, of all the climbing. For the purpose of our discussion this is perhaps the simplest way of looking at human behaviour. * * * * * Movement, then, action, is, as it were, the goal and the end of thought. Perception finds its natural outlet and completion in doing. But here comes in a curious consideration important for our purpose. In animals, in so far as they act by "instinct," as we say, perception, knowing, is usually followed immediately and inevitably by doing, by such doing as is calculated to conserve the animal and his species; but in some of the higher animals, and especially in man, where the nervous system is more complex, perception is not instantly transformed into action; there is an interval for choice between several possible actions. Perception is pent up and becomes, helped by emotion, conscious _representation_. Now it is, psychologists tell us, just in this interval, this space between perception and reaction, this momentary halt, that all our mental life, our images, our ideas, our consciousness, and assuredly our religion and our art, is built up. If the cycle of knowing, feeling, acting, were instantly fulfilled, that is, if we were a mass of well-contrived instincts, we should hardly have _dromena_, and we should certainly never pass from _dromena_ to _drama_. Art and religion, though perhaps not wholly ritual, spring from the incomplete cycle, from unsatisfied desire, from perception and emotion that have somehow not found immediate outlet in practical action. When we come later to establish the dividing line between art and ritual we shall find this fact to be cardinal.