My aim is to agitate and disturb people. I'm not selling bread; I'm selling yeast.
Chemistry ought to be not for chemists alone.
And usually [the philosopher] philosophizes either in order to resign himself to life, or to seek some finality in it, or to distract himself and forget his griefs, or for pastime and amusement.
Man dies of cold, not of darkness.
Faith which does not doubt is dead faith.
Science is a cemetary of dead ideas.