If you expect to fail, you will fail. It's a self-fulfilling prophecy .
你如果预期失败，就会失败。这是一种自我应验的预测。
牛津词典
Fear of failure can become a self-fulfilling prophecy.
害怕失败可能会真的导致失败。
The don'ts can be self-fulfilling because your mind response to pictures.
2017年6月六级真题（第二套）听力 Section B