Three things must be kept in mind to appreciate the power and depth of Psalm 68.

First: the significance of its author: King David. David as a type of the reigning Christ provides a royal perspective from the vantage point of his throne in Israel.
Second: The significance and centrality of the ark of the covenant to the progress and plight of the people of God in the tabernacle age.
Third: the symbolic continuity of the scripture pointing forward to fulfillment.

...As Ridley Herschell contemplates David's song inspired by the procession of the ark of the covenant he notes: “The Psalmist is filled with praise, when he is enabled to see that God revealed His fatherly love in the whole of that movement – that his eye was upon the fatherless, the widow, the solitary, and afflicted; but David is also carried by the Spirit to the Mount of Olives, where he sees the ascending Lord; he sees the triumphal chariots, with an innumerable company of angels, and then beholds the Lord welcomed in glory as the mighty conqueror...”