A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit.
So I said, “Wisdom is better than strength.” But the poor man’s wisdom is despised, and his words are no longer heeded.Ecclesiastes 9:16 NIV
Every tree that does not bear good fruit is cut down and thrown into the fire.Matthew 7:19 NIV
Likewise, every good tree bears good fruit, but a bad tree bears bad fruit.Matthew 7:17 NIV