Illness comes in by mouth; ills come out by it

Similar sayings:

Small ills are the fountains of most of our groans Men trip not on mountains, they stumble on stones Small ills are the fountains of most of our groans Men trip not on mountains, they stumble on stones
A rumour goes in one ear and out many mouths A rumour goes in one ear and out many mouths
Out of a dog’s mouth will never come ivory tusks Out of a dog’s mouth will never come ivory tusks
Honey in his mouth, knives in his heart Honey in his mouth, knives in his heart
How can you expect to find ivory in a dog’s mouth? How can you expect to find ivory in a dog’s mouth?

Chinese sayings and proverbs