我们必须有信心，真正表现出我们所做的。

We have to be confident and really show what we're doing.

youdao

核心是，在你证明给别人看之前你必须有信心。

In essence, you must have confidence within before you can demonstrate it in the midst of others.

youdao

首先，无论谁想要成功，就必须有信心，因为信心是成功的基本条件。

First tof all, no matter who want to success, they must have confidence, as confidence is the basic need for success.

youdao