“The seriousness of play is shown in the standard of effort and achievement that it holds up. The strictest schoolmaster of the old nose-to-the-grindstone school never secured the whole-hearted effort that is seen on the ball field every afternoon. A small boy throws a ball so as to curve in a way which a few years ago was thought to be impossible, another hits it with a round stick, while a third urchin in the distance runs as fast as he can and catches it. When you consider how little of the course of the ball the third boy saw before he started to run, and take into account—or better still experience—the other difficulties involved in the whole performance, you will realize that such feats, though seen every day on every ball field, are somewhat remarkable. At least things equally difficult done by boys in their arithmetic lessons would be considered so.” What is the tone of this passage? Use evidence to back it up if possible