Nietzsche praised with desperate laudation a classical equanimity which he was never able to reach. He would have us love fate and laugh and dance; but there were drops of scorching tears upon the page of his prophecy and the motif of his challenge was the terrible gravity of his own nature; though the conclusion of his seriousness was that we must renounce all seriousness. It is Nietzsche himself who teaches us that in estimating the value of a philosopher we have to consider the psychology of the motive-force which drove him. The motive-force that drove Nietzsche was the old savage life-instinct, penetrated with illusion through and through, and praise as he might the classical urbanity, no temper that has ever existed was less urbane than his own. The history of the human race upon this planet may be regarded--in so far as its spiritual eruptions are concerned--as the pressure upwards, from the abysmal depths, of one scoriae tempest after another, rending and tearing their way from the dark centre fires where Demogorgon turns himself over in his sleep, and becoming as soon as they reach the surface and harden into rock, the great monumental systems of human thought, the huge fetters of our imaginations. The central life-fire which thus forces its path at cataclysmic intervals to the devastated surface is certainly no illusion. It is the one terrific cosmic fact. Where illusion enters is where we, poor slaves of traditional ratiocination, seek to turn these explosions of eternal lava into eternal systems. The lava of life pours forth forever, but the systems break and crumble; each one overwhelmed in its allotted time by a new outrushing of abysmal energy. The reiterated eruptions from the fathomless depths make up the shifting material with which human civilisations build themselves their illusive homes; but the wisest civilisations are the ones that erect a hard, clear, bright wall of sceptical "suspension of judgment," from the face of which the raging flood of primordial energy may be flung back before it can petrify into any further mischief. Such a protective wall from the eruptive madness of primordial barbarism, the scepticism of classical civilisation is forever polishing and fortifying. Through the pearl-like glass of its inviolable security we are able to mock the tempest-driven eagles and the swirling glacial storms. We can amuse ourselves with the illusions from which we are free. We can give the imagination unbounded scope and the fancy unrestricted licence. We have become happy children of our own self-created kingdom of heaven; the kingdom of heaven which is the kingdom of disillusion.