What is important in the Law of the Lord is faithfulness to His Word, not lineage or position. He rewards faithfulness. God always has faithful servants who adhere to His truth and commandments. The sons of Zadok are being rewarded for their service to Him as well as their fidelity to His commandments. In spite of the group think pressure to conform to the world’s ways that are contrary to God’s Laws the Zadokites continued to follow God. The other priests left God’s Laws and prostituted themselves with the idolatrous desires of the others who left the confines of God’s Laws. They will be the closest to the Lord in the service to Him in the Messianic Kingdom’s Temple services. No other group will have greater access and service to Him them the sons of Zadok.