Al means upon, over, above, against, or concerning. It appears over 5,700 times. It expresses position (upon/above), authority (over), and relationship (concerning/on behalf of).
God is 'over' (al) all things — His sovereignty is expressed spatially. He watches over His people. Christ was lifted up 'upon' the cross. The Spirit comes 'upon' people. This simple preposition frames the relationship between divine authority and human experience.