We acknowledge but one motive - to follow the truth as we know it, whithersoever it may lead us; but in our heart of hearts we are well assured that the truth which has made us free, will in the end make us glad also.

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

The telephone book is full of facts, but it doesn't contain a single idea.

The tragedy of being both rational and animal seems to consist in having to choose between duty and desire rather than in making any particular choice

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

The teacher's role in discussion is to keep it going along fruitful lines - be moderating, guiding, correcting and arguing like one more students.

Conjugal love, or the friendship of spouses, persists after sexual desires have weakened, withered, and disappeared.