believe yourself释义：

相信自己

例句：

I realized how possible it was to overcome your limitations, to achieve well beyond what you believe yourself capable of.

我意识到如何有可能克服自身的局限，取得自认为力不能及的成就。

believe in yourself释义：

相信自己（歌曲名）

例句：

Believe in yourself, or you'll never succeed.

相信自己，否则你永远不会成功。