“No human being will ever know the truth, for even if they happened to say it by chance, they would not know they had done so.
“If you consider what are called the virtues of mankind, you will find their growth is assisted by education and cultivation
“The thing is to become a master and in your old age to acquire the courage to do what children did when they knew nothing
“To know how to grow old is the master work of wisdom, and one of the most difficult chapters in the great art of living.
“It is best to love wisely, no doubt; but to love foolishly is better than not to be able to love at all.
“Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught
“The simplest schoolboy is now familiar with truths for which Archimedes would have sacrificed his life.
“Illness is the doctor to whom we pay most heed; to kindness, to knowledge, we make promise only; pain we obey
“You know more of a road by having traveled it than by all the conjectures and descriptions in the world.