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》

Rising confidence is a good omen, since it can turn into a self-fulfilling prophecy by encouraging people to go out and spend money.

不断增长的信心是个好兆头。 原因在于，这种信心可以转化为一种自我实现的预言：它可以鼓励人们增加开支。

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Many people lack self-confidence, one of the major reason we get good results or not in life.

许多人缺乏自信，其中一个主要的原因是在生活中我们得到的结局会是好的也可能是不好的。

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Twell, a good-natured mixture of self-confidence and humility, seems comfortable with the parallels being drawn by others between her and a woman she clearly has the utmost regard for.

BBC: 'New Paula' targets gold in 2012

Parents argue that the sport is still a good way to learn discipline, self-confidence and self-reliance.

WSJ: How Squash Got Serious

In addition, they also demonstrate significantly higher levels of positive social and personality development (e.g. positive interpersonal relations, good communication and creative skills, more self-confidence and a greater ability to integrate into the school environment).

UNESCO: Family Literacy Programmes (FLPs)