To prevent any misconception that His reign is confined to a single location, we are reminded that the Lord is King of all the earth (Psalm 46:8).
How can the King of the entire world be the One who was revealed in a specific place, in Jerusalem, Judea, where He lived among humanity, was born, nourished, matured, ate, drank, rested, sat by the well in weariness, was apprehended, whipped, mocked, adorned with thorns, crucified, pierced with a spear, died, and was buried? In what sense is He the King of all the earth? What was observable in that place was His humanity; to earthly eyes, it was flesh that was evident, while His immortal majesty was concealed within mortal flesh.
And with what vision can we perceive this immortal majesty, which has united with the flesh? There are different kinds of vision, inner vision. For instance, Tobit was blind physically, yet even with his earthly blindness, he provided guidance for his son (see Tob. 4:3 ff.). The son held his father's hand to walk, receiving counsel to adhere to the path of righteousness. Here I perceive the eyes that guide life are distinct from those that only hold hands. These are the eyes to which Jesus referred when He asked Philip, "How long have I been with you, and you do not know me?" (John 14:9). It is of these eyes He commented when stating that "Philip, he who has seen me has also seen the Father" (Jn. 14:9). These are the eyes of wisdom and understanding, the eyes of the heart. Thus, when the Psalm states, "For God is king over all the earth" (cf. Ps. 46:3), He immediately adds, "Sing with understanding" (Psalms 46:8).
By saying "Sing to our God, sing," I recognize God as our King. Yet you have witnessed our King among humanity, have seen Him suffer, crucified, and dead: there lies something concealed within that flesh which is perceptible to earthly eyes. What is hidden there? Sing with understanding! Do not search with your eyes for what is comprehended by the heart. Sing with your voice, for He is present in flesh among you. Since the Word became flesh and dwelt among us (John 1:14), redirect the sound of your voice to the flesh and the gaze of your heart to God. Sing with understanding, and you will behold that the Word became flesh and dwelt among us.