[We are not] to take one step, even in the direction of what is good, beyond that to which we are irresistibly impelled by God, and this applies to action, word, and thought.

One of the most exquisite pleasures of human love - to serve the loved one without his knowing it - is only possible, as regards the love of God, through atheism.

Purity is the power to contemplate defilement.

science has now been for a long time - and to an ever-increasing extent - a collective enterprise. Actually, new results are always, in fact, the work of specific individuals; but, save perhaps for rare exceptions, the value of any result depends on such a complex set of interrelations with past discoveries and possible future researches that even the mind of the inventor cannot embrace the whole.

The work of art which I do not make, none other will ever make.

We have to try to cure our faults by attention and not by will.

Education-whether its object be children or adults, individuals or an entire people-consists in creating motives.