Wonderful sentences! “_Prodiges de la pensée speculative, décrits dans une langue non moins prodigieuse_,” as M. Scherer says of the innumerable passages which describe either this intoxication of the infinite, or the various forms and consequences of that deadening of personality which the abstract processes of thought tend to produce. But it is easy to understand that a man in whom experiences of this kind become habitual is likely to lose his hold upon the normal interests of life. What are politics or literature to such a mind but fragments without real importance--dwarfed reflections of ideal truths for which neither language nor institutions provide any adequate expression! How is it possible to take seriously what is so manifestly relative and temporary as the various existing forms of human activity? Above all, how is it possible to take one’s self seriously, to spend one’s thought on the petty interests of a petty individuality, when the beatific vision of universal knowledge, of absolute being, has once dawned on the dazzled beholder? The charm and the savor of everything relative and phenomenal is gone. A man may go on talking, teaching, writing--but the spring of personal action is broken; his actions are like the actions of a somnambulist. No doubt to some extent this mood is familiar to all minds endowed with the true speculative genius. The philosopher has always tended to become unfit for practical life; his unfitness, indeed, is one of the comic motives, so to speak, of literature. But a mood which, in the great majority of thinkers, is intermittent, and is easily kept within bounds by the practical needs, the mere physical instincts of life, was in Amiel almost constant, and the natural impulse of the human animal toward healthy movement and a normal play of function, never very strong in him, was gradually weakened and destroyed by an untoward combination of circumstances. The low health from which he suffered more or less from his boyhood, and then the depressing influences of the social difficulties we have described, made it more and more difficult for the rest of the organism to react against the tyranny of the brain. And as the normal human motives lost their force, what he calls “the Buddhist tendency in me” gathered strength year by year, until, like some strange misgrowth, it had absorbed the whole energies and drained the innermost life-blood of the personality which had developed it. And the result is another soul’s tragedy, another story of conflict and failure, which throws fresh light on the mysterious capacities of human nature, and warns us, as the letters of Obermann in their day warned the generation of George Sand, that with the rise of new intellectual perceptions new spiritual dangers come into being, and that across the path of continuous evolution which the modern mind is traversing there lies many a _selva oscura_, many a lonely and desolate tract, in which loss and pain await it.