Only in solitude do we find ourselves; and in finding ourselves, we find in ourselves all our brothers in solitude.

Those who say they believe in God and yet neither love nor fear Him, do not in fact believe in Him but in those who have taught them that God exists. Those who believe that they believe in God, but without any passion in their heart, any anguish of mind, without uncertainty, without doubt, without an element of despair even in their consolation, believe only in the God-idea, not in God.

To love with the spirit is to pity, and he who pities most loves most.

Was man made for science, or was science made for man?

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 habitually sacrifices his life to his purse, but he sacrifices his purse to his vanity.

Suffering is the substance of life and the root of personality, for it is only suffering that makes us persons.