It may take practice to think more positively and more compassionately, but just as you must train a puppy to behave the way you want it to, you must train your mind to behave itself. Otherwise, like the puppy, your mind will just make a lot of messes.

要想更积极、更富有同情心地思考可能需要练习，但就像你必须训练一只小狗按照你想要的方式行事一样，你也必须训练你的思维让它按照自己的意愿行事。否则，就像小狗一样，你的大脑会搞得一团糟。