If you ask a living teacher a question, he will probably answer you. If you are puzzled by what he says, you can save yourself the trouble of thinking by asking him what he means. If, however, you ask a book a question, you must answer it yourself. In this respect a book is like nature or the world. When you question it, it answers you only to the extent that you do the work of thinking an analysis yourself.

Love wishes to perpetuate itself. Love wishes for immortality.

Wonder is the beginning of wisdom in learning from books as well as from nature.

... always keep in mind that an article of faith is not something that the faithful assume. Faith, for those who have it, is the most certain form of knowledge, not a tentative opinion.

Men value things in three ways: as useful, as pleasant or sources of pleasure, and as excellent, or as intrinsically admirable or honorable.

You have to allow a certain amount of time in which you are doing nothing in order to have things occur to you, to let your mind think.

Unless we love and are loved, each of us is alone, each of us is deeply lonely.