电影《当幸福来敲门》中有很多经典台词，以下是其中15句经典台词的英文原文和中文翻译：

1. 'Don't ever let somebody tell you you can't do something, not even me. Alright? You dream, you gotta protect it.' - '别让任何人告诉你，你做不到某件事情，包括我在内。好吗？你有梦想，你必须保护它。'

2. 'You want something? Go get it. Period.' - '你想要什么，就去争取。没什么好说的。'

3. 'The only thing standing between you and your goal is the bullshit story you keep telling yourself as to why you can't achieve it.' - '阻挡你达成目标的唯一障碍，就是你自己编造的那些废话借口。'

4. 'The world is your oyster. It's up to you to find the pearls.' - '世界就像是你的蚝，你需要自己去找到珍珠。'

5. 'The pursuit of happiness is the most important goal in life.' - '追求幸福是生命中最重要的目标。'

6. 'I'm going to protect my family, because I love them.' - '我要保护我的家人，因为我爱他们。'

7. 'I will not be a failure in this house.' - '在这个家里，我不会失败。'

8. 'The important thing is not how much money you make, but how much you keep, and what you do with it.' - '重要的不是你挣了多少钱，而是你留下了多少，以及你如何利用它。'

9. 'You got a dream, you gotta protect it. People can't do something themselves, they wanna tell you you can't do it. You want something, go get it. Period.' - '你有梦想，你必须保护它。人们自己做不到某件事情，就会告诉你你也做不到。你想要什么，就去争取。没什么好说的。'

10. 'We can't let these people bring us down. We gotta keep our heads up.' - '我们不能让这些人打击我们。我们要保持头脑清醒。'

11. 'The moment you give up is the moment you let someone else win.' - '当你放弃的那一刻，就是你让别人获胜的那一刻。'

12. 'You're never a loser until you quit trying.' - '除非你放弃努力，否则你永远不算是失败者。'

13. 'The only way to know how strong you are is to keep testing your limits.' - '了解自己有多强大的唯一方法，就是不断地测试自己的极限。'

14. 'You don't have to be rich to be happy. You just need to find something that makes you happy.' - '你不必富有才能感到幸福。你只需要找到一些让你感到幸福的事情。'

15. 'Don't ever let someone tell you that you can't do something. You got a dream, you gotta protect it.' - '别让任何人告诉你，你做不到某件事情。你有梦想，你必须保护它。'

这些经典台词都是电影中重要的台词，它们不仅仅是人生哲理，更是鼓励人们追求自己的梦想，坚持不懈，勇往直前，相信自己，相信幸福就在前方。