pain past is pleasure
过去的痛苦即快乐。

All things are difficult before they are easy.
凡事必先难后易。

Nothing is impossible to a willing heart.
心之所愿，无事不成。

Where there is life, there is hope.
有生命必有希望。

I feel strongly that I can make it.
我坚信我一定能成功。

Better to light one candle than to curse the darkness.
与其诅咒黑暗，不如燃起蜡烛。

The shortest answer is doing.
最简短的回答就是行动。

Four short words sum up what has lifted most successful individuals above
the crowd: a little bit more.
成功的秘诀就是四个简单的字：多一点点。

还不错，而且翻译得很有味道，信达雅具备