For a good tree bringeth not forth corrupt fruit; neither doth a corrupt
tree bring forth good fruit. For every tree is known by his own fruit. For of
thorns men do not gather figs, nor of a bramble bush gather they grapes. A good
man out of the good treasure of his heart bringeth forth that which is good; and
an evil man out of the evil treasure of his heart bringeth forth that which is
evil: for of the abundance of the heart his mouth speaketh.
Luke 6:43-45
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