“We run carelessly over the precipice after having put something in front of us to prevent us seeing it.”

“We run heedlessly into the abyss after putting something in front of us to stop us seeing it.”

“Do they think that they have given us great pleasure by telling us that they hold our soul to be no more than wind or smoke, and saying it moreover in tones of pride and satisfaction? Is this then something to be said gaily? Is it not on the contrary something to be said sadly, as being the saddest thing in the world?”

“The immortality of the soul is a matter which is of so great consequence to us, and which touches us so profoundly, that we must have lost all feeling to be indifferent as to knowing what it is.”

“We are full of things which take us out of ourselves. Our instinct makes us feel that we must seek our happiness outside ourselves. Our passions impel us outside, even when no objects present themselves to excite them. External objects tempt us of themselves, and call to us, even when we are not thinking of them. And thus philosophers have said in vain, " Retire within yourselves, you will find your good there." We do not believe them, and those who believe them are the most empty and the most foolish.”

“It is absurd of us to rely on the company of our fellows, as wretched and helpless as we are; they will not help us; we shall die alone.We must act then as if we were alone. If that were so, would we build superb houses, etc.? We should unhesitatingly look for the truth. And, if we refuse, it shows that we have a higher regard for men's esteem than for pursuing the truth.”

“Nature constantly begins the same things over again, years, days, hours, spaces too. And numbers run end to end, one after another. This makes something in a way infinite and eternal. It is not that any of this is really infinite and eternal, but these finite entities multiply infinitely. Thus only number, which multiplies them, seems to me to be infinite.”