Do not lay things too much to heart. No one is ever really beaten unless he is discouraged.

Fresh air is as good for the mind as for the body. Nature always seems trying to talk to us as if she had some great secret to tell. And so she has.

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.

Life is a great gift, and as we reach years of discretion, most of us naturally ask ourselves what should be the main object of our existence.

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

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

Here are the three great questions which in life we have over and over again to answer: Is it right or wrong? Is it true or false? Is it beautiful or ugly? Our education ought to help us to answer these questions.