No one can do me any good by loving me; I have more love than I need or could do any good with; but people do me good by making me love them - which isn't easy.

The force of the guinea you have in your pocket depends wholly on the default of a guinea in your neighbour's pocket. If he did not want it, it would be of no use to you.

The step between practical and theoretic science, is the step between the miner and the geologist, the apocathecary and the chemist.

It is eminently a weariable faculty, eminently delicate, and incapable of bearing fatigue; so that if we give it too many objects at a time to employ itself upon, or very grand ones for a long time together, it fails under the effort, becomes jaded, exactly as the limbs do by bodily fatigue, and incapable of answering any farther appeal till it has had rest.

It is among children only, and as children only, that you will find medicine for your healing and true wisdom for your teaching.

The common practice of keeping up appearances with society is a mere selfish struggle of the vain with the vain.

A great thing can only be done by a great person; and they do it without effort.