Spiritual Love is born of sorrow. . . . For men love one another with spiritual love only when they have suffered the same sorrow together, when through long days they have ploughed the stony ground buried beneath the common yoke of a common grief. It is then that they know one another and feel one another and feel with one another in their common anguish, and so they pity one another and love one another.

The only reactionaries are those who find themselves at home in the present.

Those faults we do not have, do not bother us.

Science is the most intimate school of resignation and humility, for it teaches us to bow before the seemingly most insignificant of facts.

The mists remain of the false glory that erupts from history.

Science teaches us, in effect, to submit our reason to the truth and to know and judge of things as they are-that is to say, as they themselves choose to be and not as we would have them to be.

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