What is the meaning of [A tree is known by its fruit]

People are judged by what they do.

The sources are Matthew, xii, 33 and Luke, vi, 44. Here is the second of these
as given in the New English Bible:

> There is no such thing as a good tree producing worthless fruit, nor yet a
worthless tree producing good fruit. For each _tree is known by its own fruit_
; you do not gather figs from thistles, and you do not pick grapes from
brambles. A good man produces good from the store of good within himself; and
an evil man from evil within produces evil.