Apt analogies are among the most formidable weapons of the rhetorician.
The way to achieve happiness is to try for perfection that is impossible to achieve, and spend the rest of your life trying to achieve it.
When a new book appears one should read an old one.
Science should be on tap, not on top.
Where my reason, imagination or interest were not engaged, I would not or I could not learn.
Human beings are of two classes: those whose work is work and whose pleasure is pleasure; and those whose work and pleasure are one.