There is no true love save in suffering, and in this world we have to choose either love, which is suffering, or happiness. Man is the more man - that is, the more divine - the greater his capacity for suffering, or rather, for anguish.

For it is the suffering flesh, it is suffering, it is death, that lovers perpetuate upon the earth. Love is at once the brother, son, and father of death, which is its sister, mother, and daughter. And thus it is that in the depth of love there is a depth of eternal despair, out of which springs hope and consolation.

The vanity of the passing world and love are the two fundamental and heart-penetrating notes of true poetry. And they are two notes of which neither can be sounded without causing the other to vibrate.

A man does not die of love or his liver or even of old age; he dies of being a man.

True science teaches, above all, to doubt and to be ignorant.

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