You cannot appreciate happiness unless you have known sadness too.
不知道什么是忧伤，就不会真正感激幸福。
Whatever happened in the past is gone, the best is always yet to come.
无论过去发生什么，最好的永远尚未到来。
Don't you want to take a leap of faith? Or become an old man, filled with
regret.
你不想为你的信仰冒一下险吗？难道想等你老了，再后悔莫及吗？