What we see depends mainly on what we look for.

A day of worry is more exhausting than a week of work.

Happy indeed is the naturalist: to him the seasons come round like old friends; to him the birds sing: as he walks along, the flowers stretch out from the hedges, or look up from the ground, and as each year fades away, he looks back on a fresh store of happy memories.

A wise system of education will at last teach us how little man yet knows, how much he has still to learn.

Reading and writing, arithmetic and grammar do not constitute education, any more than a knife, fork and spoon constitute a dinner.

Everyone must have felt that a cheerful friend is like a sunny day, which sheds its brightness on all around; and most of us can, as we choose, make of this world either a palace or a prison.

Though it is a great mistake to make friends of the wicked and foolish, it is unwise to make enemies of them, for they are very numerous.