Habit is a second nature, or rather, it is 'ten times nature'.

You do not sing because you're happy, you're happy because you sing.

The union of the mathematician with the poet, fervor with measure, passion with correctness, this surely is the ideal.

The art of remembering is the art of thinking. When we wish to fix a new thing in either our own mind or a pupil's, our conscious effort should not be so much to impress and retain it as to connect it with something else already there. The connecting is the thinking; and, if we attend clearly to the connection, the connected thing will certainly be likely to remain within recall.

Truth is one species of good, and not, as is usually supposed, a category distinct from good, and co-ordinate with it

Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.

An educated memory depends on an organized system of associations; and its goodness depends on two of their peculiarities: first, on the persistency of the associations; and, second, on their number.