Humility can sometimes be confused with a lack of confidence.

谦逊有时会被误认为缺乏自信。

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If you want good relationships, you must have the confidence to be self-assertive when required.

如果你想要发展好的关系，在需要的时候必须要有自信，拿出主见来。

《柯林斯英汉双解大词典》

He is said to be very much in the President's confidence.

据说他深受总统的信任。

《牛津词典》

Analysts say foreign investors are motivated by growing confidence that the global recovery will be driven by countries like India and China.

VOA: standard.2009.10.16

But, just to be sure, not to be sure, but just to increase my confidence, I'm going to just run it again.

所以说它是对的是很有道理的，但是，确定一下，但是为了提高我们的自信，我要再运行一次。

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then I think absolutely plastic surgery can... maybe should be used if it's going to help with your self-confidence.

那么我觉得整形手术一定能……如果它能帮你增强自信，就应该整形。

关于整形手术 - SpeakingMax英语口语达人

There may be confidence-building measures that need to take place.

WHITEHOUSE: President Obama and Prime Minister Singh Press Availability | The White House

"For us to function effectively on behalf of the public there has to be mutual confidence within the Treasury team, and there can be no breach of trust between a Minister and his political members, " he added.

BBC: Isle of Man treasury politician sacked in tuition fees row

And if we show belief in ourselves, the British people will feel that belief and be given confidence.

BBC: NEWS | UK | UK Politics | In full: Tony Blair's speech