Still water runs deep.(静水流深）出自哪里?

Still water runs deep.(静水流深）出自哪里? Still water runs deep. 是still water runs deep 还是 still water run deep? 谚语翻译still water runs deep still water ,runs still water runs `still water run deep. Still waters run deep静水流深.具体应该怎么解释? 静水常深什么意思翻译成英文是 still water run deep 好像是英文谚语但是具体是什么意思 不太明白 恳请 Still water runs long.什么意思 still water than deep 的意思是什么? deep water stays still 这句话的含义是什么?（不要回答深水仍然保持）