7 priests, 7 horns, the seventh day, the city circled 7 times: the number 7 saturates the scene because it is the full measure of the inner work, the 7 centers along the spine sounded in order until the resistant walls give way. The priests are the awakened energies that carry the ark, the divine spark, upward before them as they move.
The rams' horns are the raised force of the lower nature turned into sound, the vibration that loosens what the outer mind has built as a fortress against the spirit. When every center has been sounded and the round is complete, the wall of habit that has stood between a person and their own inner ground simply falls, not by assault but by the finished resonance of the whole system tuned at last.
7 priests: the 7 energy centers along the spine, awakened powers carrying the divine spark upward
7 trumpets of rams' horns: the raised force of the lower nature turned to vibration, the inner sound that loosens the walls
City: the fortress of fixed habits the outer mind builds as a defense against the spirit
Seventh day: the completion of the inner cycle, the point where the resistant wall gives way