Sirach (Ecclesiasticus) 27:4-6 Good News Bible Catholic Edition (GNBDK)

4. Your talk shows your faults; it is like a sieve that separates out the rubbish.

5. The way you think shows your character just as surely as a kiln shows any flaws in the pottery being fired.

6. You can tell how well a tree has been cared for by the fruit it bears, and you can tell a person's feelings by the way he expresses himself.

Sirach (Ecclesiasticus) 27