Life is a country that the old have seen, and lived in. Those who have to travel through it can only learn from them.
The breath of the mind is attention.
When credulity comes from the heart it does no harm to the intellect.
There was a time when the world acted on books; now books act on the world.
Mediocrity is excellent to the eyes of mediocre people.
Old age takes from the man of intellect no qualities save those that are useless to wisdom.