His essence is His existence ( Ipsum Esse Subsistens ). To be God is to exist. He does not "have" life; He is Life.
When we say God is "good" and a human is "good," the word isn't used identically ( univocally ) or completely differently ( equivocally ). bog_rozni_sie_od_stworzenia_24_tezy_tomistyczne...
By establishing these theses, Thomism creates an impassable barrier against Pantheism : His essence is His existence ( Ipsum Esse Subsistens )