The subject terms are defined below; either as a quote from Geisler or as a paraphrase from his God and Creation volume.
Pure Actuality: "that which is (existence) with no possibility to not exist or to be anything other than it is-existence, pure and simple."1
Simplicity: that which is without parts, indivisible, absolutely one2
Aseity: that which exists in and of itself, independent of anything else, self-existent3
Necessity: that which cannot not exist4
Strong biblical, theological, and historical foundations grant us the ability to predicate these attributes to God.
Stand firm in Christ,
1. Geisler, Norman. Systematic Theology: Volume 2. Bloomington, MN: Bethany House Publishers, 2003. 32.
2. Ibid. 39.
3. Ibid. 58.
4. Ibid. 64.