Right from the very beginning, God had an established kingdom with Laws and that was before He even created earth. The condition of eternal life is now just what it always has been obedience to His Laws. Just like it was in the Garden of Eden before the fall. It is perfect obedience to the law of God, perfect righteousness which Yeshua showed can be done.
Not as man sees it but as God intended it. If eternal life were granted on any condition short of this, then the happiness of the whole universe would be imperiled. The way would be open for sin, with all its train of woe and misery, to be immortalized. And that is not going to happen. It all stands or God is wrong. And God is not wrong. Therefore the Laws of God are sacred and will last for all eternity.
Yeshua does not lessen the claims of the law but told the lawyer that if he wanted eternal life, he must keep the commandments. In unmistakable language He presents obedience to it as the condition of eternal life, the same condition required of Adam before his fall. The requirement under the covenant of grace is just as broad as the requirement made in Eden; it must be in harmony with God’s law, which is holy, just, and good. The standard of character presented in the Old Testament is the same that is presented in the New Testament. This standard is not one to which you cannot attain. In every command or injunction that God gives there is a promise, the most positive underlying each command. God has made provision that you may become like unto Him and He will accomplish this for all who do.
The sacred law of God will maintain its exalted character as long as the throne of God stands. This sacred law is the expression of God’s character. Types and shadows, especially the offerings and sacrifices section written on parchment, are found in Yeshua's death on the cross; but God’s law was not crucified with Yeshua. The Law of the Ten Commandments lives throughout all eternal ages. God did not make the infinite sacrifice of giving His only-begotten Son to our world, to secure for man the privilege of breaking the commandments of God in this life or in the future eternal life.
The cross speaks to the hosts of heaven, to worlds unfallen, and to the fallen world, the value which God has placed upon men, and of His great love wherewith He has loved you. It also testifies to the world, to angels, and to men, the immutability of the divine law. The death of God’s only begotten Son upon the cross in the sinner’s behalf is the unanswerable argument as to the changeless character of the sacredness and holiness of the Law of God.