The most powerful symptom of love is a tenderness which becomes at times almost insupportable.

Philosophy is the microscope of thought. Everything desires to flee from it, but nothing escapes it.

Not ill? No truly, I am young, healthful, and strong; the blood flows freely in my veins; my limbs obey my will; I am robust in mind and body, constituted for a long life. Yes, all this is true; and yet, nevertheless, I have an illness, a fatal illness,-an illness given by the hand of man!

This book should be read as one would read the book of a dead man.

It may be remarked in passing that success is an ugly thing. Men are deceived by its false resemblences to merit.

Phenomena intersect; to see but one is to see nothing.

Diamonds are found only in the dark bowels of the earth; truths are found only in the depths of thought. It seemed to him that after descending into those depths after long groping in the blackest of this darkness, he had at last found one of these diamonds, one of these truths, and that he held it in his hand; and it blinded him to look at it. (pg. 231)