I ask him to visualise, not certain non-natural properties, but the very natural, real properties of the situations that the alternative courses of action will bring about … It is not by any appeal to intuition that I can conduct my argument; … it is by revealing to him the nature of his choice, and showing him what it involves, what in fact he is choosing. And when I have done all this, I can only leave him to choose; for it is after all his choice, not mine … At any rate I have myself chosen, so far as in me lies, my own way of life, my own standard of values, my own principle of choice. In the end we all have to choose for ourselves; and no one can do it for anyone else.