Teach by doing whenever you can, and only fall back upon words when doing is out of the question. - Jean-Jacques Rousseau

Ich hätte die Menschen auch geliebt, wenn sie es nicht gewollt hätten; sie konnten sich meiner Zuneigung nur dadurch entziehen, dass sie aufhörten, Mensch zu sein.

How have a hundred men who wish for a master the right to vote on behalf of ten who do not? The law of majority voting is itself something established by convention, and presupposes unanimity, on one occasion at least. 6.

Since everything that comes into the human mind enters through the gates of sense, man's first reason is a reason of sense-experience. It is this that serves as a foundation for the reason of the intelligence; our first teachers in natural philosophy are our feet, hands, and eyes. To substitute books for them does not teach us to reason, it teaches us to use the reason of others rather than our own; it teaches us to believe much and know little.