As I give thought to the matter, I find four causes for the apparent misery of old age; first, it withdraws us from active accomplishments; second, it renders the body less powerful; third, it deprives us of almost all forms of enjoyment; fourth, it stands not far from death.
Mathematics is an obscure field, an abstruse science, complicated and exact; yet so many have attained perfection in it that we might conclude almost anyone who seriously applied himself would achieve a measure of success.
If you possess a library and a garden, you have everything you need. (translation from the French) Si vous possedez une bibliotheque et un jardin, vous avez tout ce qu'il vous faut.
I look upon the pleasure which we take in a garden as one of the most innocent delights in human life. . . It gives us a great insight into the contrivance and wisdom of Nature, and suggests innumerable subjects for meditation.
We rejoice in the joys of our friends as much as we do our own, and we are equally grieved at their sorrows. Wherefore the wise people will feel toward their friends as they do toward themselves, and whatever labor they would encounter with a view to their own pleasure, they will encounter also for the sake of their friends.