Man can be defined as an animal that makes dogmas. As he piles doctrine on doctrine and conclusion on conclusion in the formation of some tremendous scheme of philosophy and religion, he is, in the only legitimate sense . . . becoming more and more human. When he drops one doctrine after another in a refined scepticism, when he says that he has outgrown definitions, when he says that he disbelieves in finality, when, in his own imagination, he sits as God, holding to no form of creed and contemplating all, then he is by that very process sinking slowly backwards into the vagueness of the vagrant animals and the unconsciousness of grass. Trees have no dogmas. Turnips are singularly broad-minded.