Someone who does not see a pane of glass is not aware of not seeing it.

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

Absolutely unmixed attention is prayer.

Force is as pitiless to the man who possesses it, or thinks he does, as it is to its victims; the second it crushes, the first it intoxicates. The truth is, nobody really possesses it.

One could count on one's fingers the number of scientists throughout the world with a general idea of the history and development of their particular science: there is none who is really competent as regards sciences other than his own. As science forms an indivisible whole, one may say that there are no longer, strictly speaking, scientists, but only drudges doing scientific work.

There is an easiness in salvation which is more difficult to us than all our efforts.

There is only one fault, only one: our inability to feed upon light.