朝气蓬勃。- 汉语成语

Full of youthful spirit; fresh and vigorous. - Chinese Idiom

意气风发。- 汉语成语

High-spirited and vigorous; be daring and energetic. - Chinese Idiom

踌躇满志。- 汉语成语

Enormously proud of one's success; proud and self-satisfied. - Chinese Idiom

不慌不忙。- 汉语成语

Unhurried; with full composure. - Chinese Idiom

Volunteer one's own services; self-recommendation for a post or task. - Chinese Idiom

毛遂自荐。- 汉语成语

Self-confidence is the first requisite to human greatness. - Maxim

人类之所以伟大，首要的是自信。- 格言

A lack of confidence is not because of the difficulties and problems are because of the lack of confidence. – Lucius Annaeus Seneca

缺乏信心并不是因为出现了困难，而出现困难倒是因为缺乏信心 。 – 塞内加

Nothing is impossible, the word itself says I'm possible! - Audrey Hepburn

没有不可能，这个词本身说的是’我可以’。 – 奥黛丽 赫本

天无绝人之路。- 汉语成语

Heaven never seals off all the exits. - Chinese Idiom