450)=450">
Tal博士說，笑是有感染性的，如果你的笑感染了三個人，這三個人又感染了三個人，依次類推，只需要很短的時間，整個世界都會變得更加美好。Tal博士稱此為“指數(shù)函數(shù)”的作用。
就像是蝴蝶效應(yīng)： 一只蝴蝶在新加坡拍動翅膀，理論上卻能在佛羅里達引起龍卷風(fēng)！
“不積硅步，無以至千里”，如果你想要改變，則不要忽略細節(jié)，要從小事做起，事實上我們所做的每一件事都在改變世界，問題是你選擇的是哪個方向。

How many times do you think you need to roll over the piece of paper for the piece of paper to reach the moon? The moon, 240,000 miles away from us. How many times do you need to fold the piece of paper so that you can reach the moon? 41 times. So if you can have a piece of paper here, and you fold it 41 times by the end of the class, you can reach the moon. I don't know why they make such a big deal out of you know person landing on the moon. Seems quite simple to me. And here is the point. We underestimate our capacity to affect change. Because we underestimate the growth of exponential function. We're influencing people and the world every minute of our lives. The question though is in which direction are we going to do it.

你們認為需要將紙折疊多少次，才能碰到月亮？月亮離我們24萬英里，需要折紙多少次，才能碰到月亮？41次！如果你們有一張紙，再在下課之前折疊41次，你就能碰到月亮。我不理解人類登月有什么大不了的，在我看來很簡單。得出的結(jié)論是，我們低估了改變的能力。因為我們低估了指數(shù)函數(shù)的增長。我們活著的每分鐘都在影響世界和他人。問題是我們選擇哪個方向。

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