18.
"This is the day which the Lord hath made" (ver. 24). This man remembereth that he had said in former Psalms, "Since He hath inclined His ear unto me, therefore will I call upon Him as long as I live;" 1 making mention of his old days; whence he now saith, "This is the day which the Lord hath made;" that is, wherein He hath given me Salvation. This is the day whereof He said, "In an acceptable time have I heard thee, and in a day of Salvation have I helped thee;" 2 that is, a day wherein He, the Mediator, hath become the head Stone of the corner. "Let us rejoice," therefore, "and be glad in Him."
