Advice to persons about to marry - don't

The deductive method is the mode of using knowledge, and the inductive method the mode of acquiring it.

The essential quality of an animal is that it seeks its own living, whereas a vegetable has its living brought to it

We may either proceed from principles to facts, or recede from facts to principles

A fact must be assimilated with, or discriminated fromm, some other fact or facts, in order to be raised to the dignity of a truth, and made to convey the least knowledge to the mind.

Ballet-girls have a bad reputation, which is in most cases well deserved

But the branches of industry are so multifarious, the divisions of labour so minutes and manifold, that it seems at first almost impossible to reduce them to any system