Piensa el sentimiento, siente el pensamiento." (roughly translated, "Think about the emotional and feel the intellectual")

The truth is that my work - I was going to say my mission - is to shatter the faith of men here, there, and everywhere, faith in affirmation, faith in negation, and faith in abstention in faith, and this for the sake of faith in faith itself; it is to war against all those who submit, whether it be to Catholicism, or to rationalism, or to agnosticism; it is to make all men live the life of inquietude and passionate desire.

The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.

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

All knowledge has an ultimate goal. Knowledge for the sake of knowledge is, say what you will, nothing but a dismal begging of the question.

He who loves his neighbor burns his heart, and the heart, like green wood, groans when it burns, and distills itself in tears. There is no point in taking opium; it is better to put salt and vinegar in the soul's wound, for if you fall asleep and no longer feel the pain, then you no longer exist. And the point is to exist.