And the more you laugh and shout, the more pure air will pass into your blood, and make it red and healthy; and the more you romp and play--unless you overtire yourself--the quicker will that blood flow through all your limbs, to make bone and muscle, and help you to grow into a man.
But why does Lady Why like to see us play?
She likes to see you happy, as she likes to see the trees and birds happy.

For she knows well that there is no food, nor medicine either, like happiness.

If people are not happy enough, they are often tempted to do many wrong deeds, and to think many wrong thoughts: and if by God's grace they know the laws of Lady Why, and keep from sin, still unhappiness, if it goes on too long, wears them out, body and mind; and they grow ill and die, of broken hearts, and broken brains, my child; and so at last, poor souls, find "Rest beneath the Cross." Children, too, who are unhappy; children who are bullied, and frightened, and kept dull and silent, never thrive.

Their bodies do not thrive; for they grow up weak.

Their minds do not thrive; for they grow up dull.
Their souls do not thrive; for they learn mean, sly, slavish ways, which God forbid you should ever learn.