When Jesus and His disciples came to Jerusalem near the time of Passover, He entered into God’s Temple and found moneychangers who were taking advantage of others. They took currency from others who were travelling there, and from those who were purchasing materials for offerings. They even required a yearly tax during this time from every Jew, whether they were rich or dirt poor! This was an act of fraud, and Jesus exposed it for what it was.
He made a whip of cords and drove them all out of the temple—oxen, sheep, doves and all. He overturned the tables of the moneychangers and dumped out their profits on the ground. He flipped over the chairs of those who sold doves, and said, “My house is a house of prayer, but you have made it a den of thieves” (Compare Matthew 21:12-13 Matthew 21:12-13  And Jesus went into the temple of God, and cast out all them that sold and bought in the temple, and overthrew the tables of the moneychangers, and the seats of them that sold doves,
 And said to them, It is written, My house shall be called the house of prayer; but you have made it a den of thieves.
American King James Version×, Mark 11:15-18 Mark 11:15-18  And they come to Jerusalem: and Jesus went into the temple, and began to cast out them that sold and bought in the temple, and overthrew the tables of the moneychangers, and the seats of them that sold doves;  And would not suffer that any man should carry any vessel through the temple.  And he taught, saying to them, Is it not written, My house shall be called of all nations the house of prayer? but you have made it a den of thieves.  And the scribes and chief priests heard it, and sought how they might destroy him: for they feared him, because all the people was astonished at his doctrine.
American King James Version×, and John 2:13-17 John 2:13-17  And the Jews' passover was at hand, and Jesus went up to Jerusalem.  And found in the temple those that sold oxen and sheep and doves, and the changers of money sitting:  And when he had made a whip of small cords, he drove them all out of the temple, and the sheep, and the oxen; and poured out the changers' money, and overthrew the tables;  And said to them that sold doves, Take these things hence; make not my Father's house an house of merchandise.  And his disciples remembered that it was written, The zeal of your house has eaten me up.
American King James Version×). It was crystal clear that He did not accept what was actually taking place behind the scenes.
Ephesians 5:8-13 Ephesians 5:8-13  For you were sometimes darkness, but now are you light in the Lord: walk as children of light:
 (For the fruit of the Spirit is in all goodness and righteousness and truth;)
 Proving what is acceptable to the Lord.
 And have no fellowship with the unfruitful works of darkness, but rather reprove them.
 For it is a shame even to speak of those things which are done of them in secret.
 But all things that are reproved are made manifest by the light: for whatever does make manifest is light.
American King James Version×says: “Once you lived in the dark, but now the Lord has filled you with the light. Live as children who have light. Light produces everything that is good, that has God’s approval, and that is true. Determine which things please the Lord. Have nothing to do with the useless works that darkness produces. Instead, expose them for what they are” (God's Word Translation).
God searches the dark places of our hearts and tests our minds (Jeremiah 17:9-10 Jeremiah 17:9-10  The heart is deceitful above all things, and desperately wicked: who can know it?
 I the LORD search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings.
American King James Version×). In our lives, if we accept and go along with sin like it isn’t there, we conceal darkness, deceive ourselves, and cannot be truly unified with God or one another—whether we realize it or not.
John wrote: “This is the message we have heard from him (Christ) and declare to you: God is light; in him there is no darkness at all. If we claim to have fellowship with him yet walk in the darkness, we lie and do not live by the truth. But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son purifies us from all sin” (1 John 1:5-7 1 John 1:5-7  This then is the message which we have heard of him, and declare to you, that God is light, and in him is no darkness at all.
 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleans us from all sin.
American King James Version×, NIV). So let us all turn over any hidden tables of deceit and darkness in our hearts and be unified to God and with one another, through the light and mercy of Jesus Christ.