Schools are not intended to moralize a wicked world, but to impart knowledge and develop intelligence, with only two social aims in mind: prepare to take on one's share in the world's work, and perhaps in addition, lend a hand in improving society, after schooling is done.

The intellectuals' chief cause of anguish are one another's works.

It seems a long time since the morning mail could be called correspondence.

Science is, in the best and strictest sense, glorious entertainment

The mind tends to run along the groove of one's intention and overlook the actual expression.

In teaching you cannot see the fruit of a day's work. It is invisible and remains so, maybe for twenty years.

Above all, do not talk yourself out of good ideas by trying to expound them at haphazard meetings.