风趣常常是一副面具。

Wit is often a mask.

给他戴上一副面具，他就会告诉你实话。

Give him a mask, and he will tell you the truth.

他在假面舞会上戴了一副面具。

He wore a vizard to the masquerade ball.

没人能在任何一个时期里，面对自己时戴一副面具，在别人面前又表现出另外一副嘴脸，而最终不为哪个才是真实的自我而迷茫的。

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.