Here is the difficulty, a difficulty of the profoundest and most instructive sort. If we could see our way clearly through it, little in ethics would remain obscure. The common mode of meeting it is to leave it thus paradoxical. Self-sacrifice banishes rationality and is a glorious madness. But such a conclusion is a repellent one. How can it be? Reason is man's distinctive characteristic. While brutes act blindly, while the punctual physical universe minutely obeys laws of which it knows nothing, usually it is open to man to judge the path he will pursue. Shall we then say that, though reason is a convenience in all the lower stretches of life, when we reach self-sacrifice, our single awesome height, it ceases? I cannot think so. On the contrary, I hold that in self-sacrifice we have a case not of glorious madness, but of somewhat extreme rationality. How, then, is rational contrasted with irrational guidance? As we here approach the central and most difficult part of our discussion, clearness will oblige me to enter into some detail. When a child looks at a watch, he sees a single object. It is something there, a something altogether detached from his consciousness, from the table, from other objects around. It is a brute fact, one single thing, complete in itself. Such is the child's perception. But a man of understanding looks at it differently. Its detached singleness is not to him the most important truth in regard to it. Its meaning must rather be found in the relations in which it stands, relations which, seeming at first to lie outside it, really enter into it and make it what it is. The rational man would accordingly see it all alive with the qualities of gold, brass, steel, the metals of which it is composed. He would find it incomprehensible apart from the mind of its maker, and would not regard that mind and watch as two things, but as matters essentially related. Indeed, these relations would run wider still, and reason would not rest satisfied until the watch was united to time itself, to the very framework of the universe. Apart from this it would be meaningless. In short, if a man comprehends the watch in a rational way he must comprehend it in what may he called a conjunct way. The child might picture it as abstract and single, but it could really be known only in connection with all that exists. Of course we pause far short of such full knowledge. Our reason cannot stretch to the infinity of things. But just so far as relations can be traced between this object and all other objects, so much the more rational does the knowledge of the watch become. Rationality is the comprehending of anything in its relations. The perceptive, isolated view is irrational.