Jesus came to uphold the words of God, not tear them down. His message was fresh but not new. The more you read of the Hebrew Bible, the more you’ll see it echoed in the words of Jesus.

Jesus says in Matthew 5:17-20
17 “Don’t assume that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill. 18 For I assure you: Until heaven and earth pass away, not the smallest letter or one stroke of a letter will pass from the law until all things are accomplished. 19 Therefore, whoever breaks one of the least of these commands and teaches people to do so will be called least in the kingdom of heaven. But whoever practices and teaches these commands will be called great in the kingdom of heaven. 20 For I tell you, unless your righteousness surpasses that of the scribes and Pharisees, you will never enter the kingdom of heaven.

Here are some illustrations of this –

Consider his words in Luke 14:7-11
7 He told a parable to those who were invited, when He noticed how they would choose the best places for themselves: 8 “When you are invited by someone to a wedding banquet, don’t recline at the best place, because a more distinguished person than you may have been invited by your host. 9 The one who invited both of you may come and say to you, ‘Give your place to this man,’ and then in humiliation, you will proceed to take the lowest place. 10 “But when you are invited, go and recline in the lowest place, so that when the one who invited you comes, he will say to you, ‘Friend, move up higher.’ You will then be honored in the presence of all the other guests. 11 For everyone who exalts himself will be humbled, and the one who humbles himself will be exalted.”

This is an illustration of Proverbs 25:6-7
6 Don’t brag about yourself before the king,
and don’t stand in the place of the great;
7 for it is better for him to say to you, “Come up here!”
than to demote you in plain view of a noble.

Likewise, Proverbs 25:8-10 continues on, saying –
8 Don’t take a matter to court hastily.
Otherwise, what will you do afterward
if your opponent humiliates you?
9 Make your case with your opponent
without revealing another’s secret;
10 otherwise, the one who hears will disgrace you,
and you’ll never live it down.

These teachings are illustrated in various verses –
Matthew 5-21-26
21 “You have heard that it was said to our ancestors, Do not murder, and whoever murders will be subject to judgment. 22 But I tell you, everyone who is angry with his brother will be subject to judgment. And whoever says to his brother, ‘Fool!’ will be subject to the Sanhedrin. But whoever says, ‘You moron!’ will be subject to hellfire.23 So if you are offering your gift on the altar, and there you remember that your brother has something against you, 24 leave your gift there in front of the altar. First go and be reconciled with your brother, and then come and offer your gift. 25 Reach a settlement quickly with your adversary while you’re on the way with him, or your adversary will hand you over to the judge, the judge to the officer, and you will be thrown into prison. 26 I assure you: You will never get out of there until you have paid the last penny!

Matthew 18:15-20
15 “If your brother sins against you, go and rebuke him in private. If he listens to you, you have won your brother. 16 But if he won’t listen, take one or two more with you, so that by the testimony of two or three witnesses every fact may be established. 17 If he pays no attention to them, tell the church. But if he doesn’t pay attention even to the church, let him be like an unbeliever and a tax collector to you.18 I assure you: Whatever you bind on earth is already bound in heaven, and whatever you loose on earth is already loosed in heaven.19 Again, I assure you: If two of you on earth agree about any matter that you pray for, it will be done for you by My Father in heaven.20 For where two or three are gathered together in My name, I am there among them.”

Jesus expands and illustrates the lessons and teachings from the Scriptures he grew up with, and explains them in relatable ways to people. Instead of just repeating them, he made the teachings meaningful by telling them as stories. But he didn’t make up the original teaching. He built upon the old to create something new.

(all Bible translations are HCSB)