Being too demanding with yourself leads to unhappiness（节选）

Naturally, you like things to go well.

However, you know that your plans and aspirations don't always turn out as you'd hoped.

译：然而，你明白自己的计划和愿望并不能总如你所愿。

Because you can't ask anyone for more than they're capable of giving, nor should you expect others to be what you want them to be.

译：因为你不能要求任何人做力所不能及的给予，你也不应该期望别人成为你希望他们要成为的样子。

First, you must learn to respect and love yourself as you are, with all your plus and minus points.

However, you must be aware that, even if you put all your efforts into doing things right, you won't always get the expected results. 

译：然而，你必须意识到，即使你全力以赴把事情做好，你也不会总是得到预期的结果。

Indeed, life isn't perfect and neither are you.