We ask of play that it shall rest, refresh, exhilarate.

Is there any form of mental activity that secures all these ends so thoroughly and so directly as doing something that a man really likes to do, doing it with all his heart, all the time conscious that he is helping to make the world better for some one else?
A man's "play" can take many forms.

If his life has been barren of books or travel, let him read or see the world.

But he reaches his high estate by either of these roads only when he reads or travels to enrich himself in order to give out what he gets to enrich the lives of others.

He owes it to himself to get his own refreshment, his own pleasure, but he need not make that pure self-indulgence.
Other men, more active in body and mind, feel drawn to the modern arena of the great questions that puzzle.