Keep on going, never give up.

勇往直前，永不放弃!

Believe in yourself.

相信自己!

You think you can, you can.

你认为你行，你就行!

Never say die.

永不气馁!

Success is not final, failure is not fatal: it is the courage to continue that counts.

成功不是终点，失败也不是致命，真正重要的是勇气和坚持。

Everything is worth doing well.

任何值得做的事就值得全力以赴!

Life is but a span.

人生苦短，珍惜当下。

Do what you say, say what you do.

做出言行一致的事。

I can make it through the rain. I can stand up once again on my own.

我能穿越风雨，也能东山再起。

All things come to those who wait.

苍天不负有心人。

说明：

以上短句均来自权威来源，涵盖坚持、自信、成长等核心主题，适合用于签名或激励场景。若需更多内容，可参考权威励志书籍或网站。