A bad conscience is a snake in one's heart.
做贼心虚。
A bad workman quarrels with his tools.
拙匠常怨工具差。
A bird in the hand is worth two in the bush.
双鸟在林不如一鸟在手。
A bird is known by its note, and a man by his talk.
闻其歌知其鸟，听其言知其人。
A blind man who leans against a wall imagines that it's the boundary of the world.
坐井观天。
Absence sharpens love, presence strengthens it.
相聚爱益切，离别情更深。
A burnt child dreads the fire.
一朝被蛇咬，十年怕井绳。
Accidents will happen.
天有不测风云。
A clean hand wants no washing.
身正不怕影子斜。
A clear conscience is a soft pillow.
问心无愧，高枕无忧。
A clear conscience is a sure card.
光明磊落，胜券在握。
A clear conscience laughs at false accusations.
白日不做亏心事，夜半敲门心不惊。
A clear fast is better than a dirty breakfast.
宁为清贫，不为浊富。
A close mouth catches no flies.
病从口入，祸从口出。
A cock is valiant on his own dunghill.
夜郎自大。
A common danger causes common action.
同仇敌忾。
A contented mind is perpetual feast.
知足常乐。
Actions speak louder than words.
事实胜於雄辩。