把这一句，留给此刻的你

Not until, years later, I found my true interest in life did I discover that I could master a subject, no matter how difficult, if it helped me in what I wanted to do.

直到多年以后，我发现我对生活的真正兴趣，我才发现我可以掌握一门学科，不管它有多难，只要它能帮助我做我想做的事情。

— Lincoln Ellsworth 斯沃思