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A man doesn't plant a tree for himself. He plants it for posterity.

A man has made at least a start on discovering the meaning of human life when he plants shade trees under which he knows full well he will never sit.

We must cultivate our own garden. When man was put in the garden of Eden he was put there so that he should work, which proves that man was not born to rest.

Like people, trees are all individuals.

Man's survival, from the time of Adam and Eve until the invention of agriculture, must have been precarious because of his inability to ensure his food supply.

He plants trees to benefit another generation.

The cultivation of trees is the cultivation of the good, the beautiful, and the ennobling in man, and for one, I wish to see it become universal.

A man is not idle because he is absorbed in thought. There is a visible labor and there is an invisible labor.

Nothing on this earth is standing still. It's either growing or it's dying. No matter if it's a tree or a human being.