你越是重复某种行为，就越会强化与这种行为相关的身份认同。事实上，“身份认同”这个词最初源自拉丁语中的“essentitas”（意为“存在”）和“identidem”（意为“重复”）。从字面上来看，你的身份认同其实就是你“反复表现出来的存在方式”。
The more you repeat a behavior, the more you reinforce the identity associated with that behavior. In fact, the word identity was originally derived from the Latin words essentitas, which means being, and identidem, which means repeatedly. Your identity is literally your “repeated beingness.”
无论你目前的身份是什么，你之所以相信它，正是因为你有相应的证据来支持这一身份。如果你连续二十年每个星期天都去教堂，那么你就有了自己具有宗教信仰的证据；如果你每晚花一小时学习生物学，那么你就有了自己勤奋好学的证据；如果你即使在下雪的时候也去健身房锻炼，那么你就有了自己致力于健康生活的证据。你对某种信念拥有的证据越多，你就会越坚定地相信它。
Whatever your identity is right now, you only believe it because you have proof of it. If you go to church every Sunday for twenty years, you have evidence that you are religious. If you study biology for one hour every night, you have evidence that you are studious. If you go to the gym even when it’s snowing, you have evidence that you are committed to fitness. The more evidence you have for a belief, the more strongly you will believe it.
