I can, therefore I am.

Attention is the rarest and purest form of generosity.

The destruction of the past is perhaps the greatest of all crimes.

In reality nothing is so beautiful as the good, nothing is so monotonous and boring as evil.

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.

Grace fills empty spaces, but it can only enter where there is a void to receive it, and it is grace itself which makes this void.

Intellectual adherence is never owed to anything whatsoever, for it is never in any degree a voluntary thing. Attention alone is voluntary. It alone forms the subject of an obligation.