Every established fact which is too bad to admit of any other defence is always presented to us as an injunction of religion.

Co-operation, like other difficult things, can be learned only by practice: and to be capable of it in great things, a people must be gradually trained to it in small. Now the whole course of advancing civilization is a series of such training.

It is a law, that every event depends on some law.

...there ought to exist the fullest liberty of professing and discussing, as a matter of ethical conviction, any doctrine, however immoral it may be considered.

Truths are known to us in two ways: some are known directly, and of themselves; some through the medium of other truths. The former are the subject of Intuition, or Consciousness; the latter, of Inference; the latter of Inference. The truths known by Intuition are the original premisses, from which all others are inferred.

There is no 'one-size-fits-all' way to build an audience.

Unfortunately for the good sense of mankind, the fact of their fallibility is far from carrying the weight in their practical judgement, which is always allowed to it in theory; for while every one well knows himself to be fallible, few think it necessary to take any precautions against their own fallibility.