ROMANS # 361, Paul reprimands the weak believer for judging the strong believer. (9-12-24)

Romans 14:9 For to this end Christ died at a point in time, and lived again at a point of time, that He might be Lord (idiomatic phrase) [that He became Lord ] at a point in time, over both the dead and of those who are living.
One reason for Jesus’ death and resurrection, was that he would be the Lord of both the dead and the living. His lordship is universal. His subjects are not merely those who are alive at the present time, but also those who have died previously are subject to his authority. Therefore he is the judge of all.