Those who cannot remember clearly their own childhood are poor educators.

When curiosity turns to serious matters, it's called research.

The sympathy of most people consists of a mixture of good-humour, curiosity, and self-importance.

They understand but a little who understand only what can be explained.

There is only one proof of ability - action.

Never expect women to be sincere, so long as they are educated to think that their first aim in life is to please.

The believer who has never doubted will hardly convert a doubter.