Without a covenant man cannot have any permanent relationship with God. Covenant has eternal impact. It is because of the covenant that that Israel is back in the land. In ancient time, this is how they would cut a covenant !
How a Covenant is made
They would take an animal, normally a heifer, cut in half, head to tail. You cannot have a covenant without the shedding of blood. The shedding of blood implies a life lay down. Then the two parties would walk through the middle of the sacrifice. They were saying to one another: I am laying down my life for you. You cannot be in a covenant and hold on dear to your life. Then they would eat a covenant meal together and exchange their assets. They were saying : all that I have is yours and all what is yours is mine.
Abraham was in covenant relationship with God. In Genesis 14, after his return from victory over Kedorlaomer , Melchesedek came out to meet him with bread and wine and God said to Abraham: I am the possessor of heaven and earth. All I have is yours. What can Abraham give to God! He had much livestock from the spoil of war. I’ll give you 10% of all that I have as a token of the covenant that all I have is yours.
Later on in Genesis we see Jacob also keeping the emblem of the covenant and as a result God greatly blessed him . Abraham must have passed on this knowledge to his descendants and commanded them to obey God's command.
The emblem of the new covenant
Today we have the new covenant. We take the emblem of the bread and the wine as a sign of the covenant and we give the tithes as a token of the covenant that everything we have belonged to God. . The tithes existed long before the giving of the Torah. Later on, God incorporated it in the Torah to make it easy for the people to remember it. Tithing is where we begin but this is not the ceiling. Israel was commanded to give beyond the tithes.
God does not violate covenant.
God does not violate covenant. He made the old covenant with the house of Israel. He also made the new covenant with the house of Israel.( Jeremiah 31). But in the new covenant, He is adding new dimensions to the previous old covenant he made with them. Making it a better covenant with better promises. It is the same covenant made with the same people, the house of Israel but with a whole new dimension to it.
We the gentiles have been en-grafted into the new covenant God made with Israel and be made partakers of the blessings of that Covenant. The new covenant was not made with the church but with Israel. Theirs is the glory and the covenants and the giving of the Law and the temple service and the promises
The Torah which was written by the finger of God on table of stones, the same Torah is now written by the Holy Spirit on the table of the hearts of NT believers. The only difference between Israel and the church is that Israel has both the spiritual and the physical dimension of the Torah. The physical dimension of the Torah as reflected in the various ritual . The church has the spiritual dimension of the Torah only but with only a few ritual like water baptism and the taking of communion.
Renewing the Covenant
Each time we take communion, we are renewing the covenant. Each time we give the tithes, we are renewing the Covenant. You cannot be in a covenant and hold dear to your life, there has to be a laying down of your life. You cannot be in a covenant and not be partaking of the emblem of the covenant . Tithing is an emblem of the covenant.
Sermon on the Mount
The Sermon on the Mount is the most comprehensive statement that Jesus ever made about what his kingdom is like. He is a king; he is bringing a kingdom here and now. These are the core values of my kingdom and this is what I am like, and this is how the citizens of my kingdom are like. They are meek and lowly, they hunger and thirst for righteousness , they are pure in heart ....
Then he tells us how to cultivate these beatitudes in the garden of your heart. GIVE PRAY FAST !
Jesus starts with giving first. I would have started with prayer, fasting then giving last. But Jesus starts first with giving, then prayer and fasting. Why!! Giving is an emblem of the covenant