Yes, yes, I see it all! — an enormous social activity, a mighty civilization, a profuseness of science, of art, of industry, of morality, and afterwords, when we have filled the world with industrial marvels, with great factories, with roads, museums and libraries, we shall fall exhausted at the foot of it all, and it will subsist — for whom? 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.

Sometimes, to remain silent is to lie, since silence can be interpreted as assent.

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

The supreme triumph of reason is to cast doubt upon its own validity.

It is sad not to love, but it is much sadder not to be able to love.

Scholasticism, a concept which does not bear criticism, is a theological concept specifically designed to sustain faith in the immortality of the soul.