“...there is no explaining anything by reasoning and so it is useless to reason.”
“Let us not forget that the reasons for human actions are usually incalculably more complex and diverse than we tend to explain them later, and are seldom clearly manifest.”
“I am glad that at such a moment my young man turned out to be not so reasonable; the time will come for an intelligent man to be reasonable, but if at such an exceptional moment there is no love to be found in a young man's heart, then when will it come?”
“You see, gentlemen, reason is an excellent thing, there's no disputing that, but reason is nothing but reason and satisfies only the rational side of man's nature, while will is a manifestation of the whole life, that is, of the whole human life including reason and all the impulses. And although our life, in this manifestation of it, is often worthless, yet it is life and not simply extracting square roots. Here I, for instance, quite naturally want to live, in order to satisfy all my capacities for life, and not simply my capacity for reasoning, that is, not simply one twentieth of my capacity for life. What does reason know? Reason only knows what it has succeeded in learning (some things, perhaps, it will never learn; this is a poor comfort, but why not say so frankly?) and human nature acts as a whole, with everything that is in it, consciously or unconsciously, and, even if it goes wrong, it lives.”
“Reason is the slave of passion.”
“When reason fails, the devil helps!”
“...they ate the apple, and knew good and evil, and became 'as gods.' And they still go on eating it. But little children have not eaten anything and are not yet guilty of anything...If they, too, suffer terribly on earth, it is, of course, for their fathers; they are punished for their fathers who ate the apple--but that is reasoning from another world; for the human heart here on earth it is incomprehensible.”