Confidence in yourself is the first step on the road to success.
自信是走向成功的第一步。

You never know till you have tried.
不尝试，不知晓。

A good friend is my nearest relation.
好友如近亲。

Doing is better than saying.
与其挂在嘴上，不如落实在行动上。

Don't make a mountain out of a molehill.
不要小题大做。