We are known by our actions, and the fruitful tree in scripture represents that if we are good then we bring forth good fruit, but if we side with wickedness and evil our fruits are corrupt and unprofitable (Luke 6:43-45), 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. (Proverbs 13:2-3).
The wisdom of the world at times brings strife and arguing, but wisdom which comes from above brings nothing but good along with mercy and good fruits! (James 3:17-18). But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy. And the fruit of righteousness is sown in peace of them that make peace.
Long before Jesus said “You will know them by their fruits” we see Jeremiah presented with a basket of good and evil figs which represents good and evil, he then learns the fate of both the good and bad fruit! (Jeremiah 24:1-10) The LORD shewed me, and, behold, two baskets of figs were set before the temple of the LORD, after that Nebuchadrezzar king of Babylon had carried away captive Jeconiah the son of Jehoiakim king of Judah, and the princes of Judah, with the carpenters and smiths, from Jerusalem, and had brought them to Babylon. One basket had very good figs, even like the figs that are first ripe: and the other basket had very naughty figs, which could not be eaten, they were so bad. Then said the LORD unto me, What seest thou, Jeremiah? And I said, Figs; the good figs, very good; and the evil, very evil, that cannot be eaten, they are so evil. Again the word of the LORD came unto me, saying, Thus saith the LORD, the God of Israel; Like these good figs, so will I acknowledge them that are carried away captive of Judah, whom I have sent out of this place into the land of the Chaldeans for their good. For I will set mine eyes upon them for good, and I will bring them again to this land: and I will build them, and not pull them down; and I will plant them, and not pluck them up. And I will give them an heart to know me, that I am the LORD: and they shall be my people, and I will be their God: for they shall return unto me with their whole heart. And as the evil figs, which cannot be eaten, they are so evil; surely thus saith the LORD, So will I give Zedekiah the king of Judah, and his princes, and the residue of Jerusalem, that remain in this land, and them that dwell in the land of Egypt: And I will deliver them to be removed into all the kingdoms of the earth for their hurt, to be a reproach and a proverb, a taunt and a curse, in all places whither I shall drive them. And I will send the sword, the famine, and the pestilence, among them, till they be consumed from off the land that I gave unto them and to their fathers.
When we are chastened by the Lord it is not pleasant but needful as He does it out of love for His children (Revelation 3:19).It is this chastening that forms us into what is good for our character as representing Christ whom we serve. The fruit of righteousness shines forth (Hebrews 12:11-14). Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby. Wherefore lift up the hands which hang down, and the feeble knees; And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed. Follow peace with all men, and holiness, without which no man shall see the Lord.
(Matthew 12:33) Either make the tree good, and his fruit good; or else make the tree corrupt, and his fruit corrupt: for the tree is known by his fruit.