This absence of all potentiality in God obliges Him to be immutable. He is actuality, through and through. Were there anything potential about Him, He would either lose or gain by its actualization, and either loss or gain would contradict his perfection. He cannot, therefore, change. Furthermore, He is immense, boundless; for could He be outlined in space, He would be composite, and this would contradict his indivisibility. He is therefore omnipresent, indivisibly there, at every point of space. He is similarly wholly present at every point of time,—in other words eternal.