A Cheerful friend is like a sunny day, which sheds its brightness on all around.
The important thing is not so much that every child should be taught, as that every child should be given the wish to learn.
A wise system of education will at last teach us how little man yet knows, how much he has still to learn.
A day of worry is more exhausting than a week of work.
Happiness is a thing to be practiced, like the violin.
Our own happiness ought not to be our main objective in life.