"Lift up your heads, O gates, And be lifted up , O ancient doors, that the King of glory may come in.” (v.7)
This Psalm was composed for a choir as a choral hymn to celebrate the removal of the Ark from the house of Obed-edom to Mount Zion, its new resting place prepared by king David (2 Samuel 6). Scripture describes, the great procession by which it was delivered, who was to do the carrying, as well as how it was to be carried. All along the way sacrifices were made, music and song along with worship and praise were lifted up, until it finally arrived (1 Chronicles 15:2-27). Then the shout went out, “Open the gates”, the ark of the LORD has arrived.
Just as there was a great celebration made and the cry to "open the gates" went out when the ark arrived in Zion, so there will be another great celebration and the cry to “open the gates” when we are gathered together to meet our LORD in the air, when He, our King, takes us to be with Him in Glory (1 Thessalonians 4:17). Hallelujah!
The Truth: "For the Lord Himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord.” (1 Thessalonians 4:17)