“What light is to the outer physical world intellect is to the inner world of consciousness. For intellect is related to the will, and thus also to the organism which is nothing other than will regarded objectively, in the approximate same way as light is to a combustible body and the oxygen in combination with which it ignites.”

“Every light can be extinguished. The intellect is a light. Therefore it can, be extinguished.”

“How very paltry and limited the normal human intellect is, and how little lucidity there is in the human consciousness, may be judged from the fact that, despite the ephemeral brevity of human life, the uncertainty of our existence and the countless enigmas which press upon us from all sides, everyone does not continually and ceaselessly philosophize, but that only the rarest of exceptions do.”

“A high degree of intellect tends to make a man unsocial.”

“Men best show their character in trifles, where they are not on their guard. It is in the simplest habits, that we often see the boundless egotism which pays no regard to the feelings of others and denies nothing to itself.”

“They tell us that Suicide is the greatest piece of Cowardice... That Suicide is wrong; when it is quite obvious that there is nothing in this world to which every man has a more unassailable title than to his own life and person.”

“The conviction that the world, and therefore man too, is something which really ought not to exist is in fact calculated to instil in us indulgence towards one another: for what can be expected of beings placed in such a situation as we are? From this point of view one might indeed consider that the appropriate form of address between man and man ought to be, not monsieur, sir, but fellow sufferer, compagnon de misères. However strange this may sound it corresponds to the nature of the case, makes us see other men in a true light and reminds us of what are the most necessary of all things: tolerance, patience, forbearance and charity, which each of us needs and which each of us therefore owes.”