This is the day that the LORD has made; let us rejoice and be glad in it. 

This reference of the passage is not just confined to the Sabbath, for the whole gospel day is the day of God's making, and its blessings come to us through our Lord's being placed as the head of the corner. "We will rejoice and be glad in it." What else can we do? Having obtained so great a deliverance through our illustrious leader, and having seen the eternal mercy of God so brilliantly displayed, it would ill become us to mourn and murmur. Rather will we exhibit a double joy, rejoice in heart and be glad in face, rejoice in secret and be glad in public, for we have more than a double reason for being glad in the Lord.

CH Spurgeon; The Treasury of David