Our purpose is to be useful, and nothing so long as it is always before our eyes excites our imagination, and no longer impresses us, and it is only through our imagination that we can feel the sorrows of others.So, let your student know the affairs and sorrows of those around him, but not too much.Choose one thing carefully, show it to him at the right time, and it will make him feel sentimental for a month.His opinion of things depends largely not on what he sees, but on his reactions.If he has a lasting impression on a thing, it is not because of the thing itself, but because of his opinion of it.