Hey, you must be confident of yourself if you want to succeed.

你必须对自己有信心才能成功！

youdao

First, you should equip yourself with the knowledge you can acquire. Only thus can you be confident of yourself.

第一，你应该用你学习到的知识来装备自己，只有这样你才能相信自己。

youdao

In order to be confident in yourself, you must understand and have experienced the nature of failure.

为了获得自信，你一定要懂得并体验失败的本质，因为没有失败你就不能理解什么是成功。

youdao

If you put yourself in the hands of someone who knows what they are doing, you can be confident it will look good.

WSJ: 20 Odd Questions: Nicky Haslam