First--Because "the day which the Lord hath made" is the same in which Christ went in by the gates of righteousness. Verses 19 and 20. "Open to me the gates of righteousness: I will go into them, and I will praise the Lord. This gate of the Lord, into which the righteous shall enter." Now, though Christ _did_ come up from "the gates of death" on the day of his resurrection, he _did not_ formally "enter" by "the gates of righteousness," till that day when he ascended from Mount Olivet, which was not the first day of the week. His almighty power and eternal Sonship were declared most gloriously on the day of his resurrection; but it was on the day of his ascension that his mediatorial righteousness was formally approved by the Father; while it was visibly manifested, in the presence of the universe, that the door of heaven had been opened to all true believers. Then shouted the seraphim, and all the host of heaven, while the door-posts of the New Jerusalem trembled at the voice, "Arise, O Jehovah, into thy rest, thou, and the ark of thy strength. Let thy priests be clothed with righteousness; and let thy saints shout for joy!" Therefore, this is not the day of Christ's resurrection, but that of his ascension. Second--Because "the day which the Lord hath made" is the same in which "the stone which the builders refused" became "the head-stone of the corner," (verse 22.) Christ did not become "the head of the corner," till he "sat down on the right hand of God." You assert that he did, and refer to Acts 4:10, 11, quoted above, as proof. From what the apostle there sets forth, you draw the inference, that, as he was set at nought by the builders, when he was crucified, so he became the head of the corner, when God raised him from the dead. The apostle does not say, however, that this took place on the same day that he rose from the dead; and all that we must _necessarily_ infer from what he _does say_, is, that he became the head of the corner since his resurrection, which is cheerfully admitted. But whether it was on the same day, or two, or ten, or forty days after, the apostle saith not. Still your inference would be entirely natural and proper, if it were not contrary to the analogy of faith, and to the teachings of the same spirit in other parts of the Scriptures. I suppose it will be admitted, that when Christ became the head of the corner, he became "the head over all things to the church," and that then "all things were put under his feet." Now the apostle clearly teaches, that these things took place when he sat down on the right hand of God, as appears from the following texts:--