“Habit is necessary. It is the habit of having habits, of turning a trail into a rut, that must be incessantly fought against if one is to remain alive ... one can remain alive long past the usual date of disintegration if one is unafraid of change, insatiable in intellectual curiosity, interested in the big things, and happy in small ways.”

“One can remain alive long past the usual date of disintegration if one is unafraid of change, insatiable in intellectual curiosity, interested in big things, and happy in small ways.”

“In spite of illness, in spite even of the archenemy sorrow, one can remain alive long past the usual date of disintegration if one is unafraid of change, insatiable in intellectual curiosity, interested in big things, and happy in small ways.”

“In spite of illness, in spite even of the archenemy sorrow, one can remain alive long past the usual date of disintegration if one is unafraid of change, insatiable in intellectual curiosity, interested in big things, and happy in small ways.”

“So long as one remains in the same condition, the inclinations which result from habit and are the least natural to us can be kept; but as soon as the situation changes, habit ceases and the natural returns. Education is certainly only habit. Now are there not people who forget and lose their education? Others who keep it? Where does this difference come from? If the name nature were limited to habits conformable to nature, we would spare ourselves this garble!”

“So long as one is happy one can endure any discipline: it was unhappiness that broke down the habits of work.”