Christians claim that their concept of God is found in the Bible. Known as classical theism, this view of God has long been considered the orthodox theistic position of the Western world. Though there are numerous divine attributes that we could examine, for our present purposes it is sufficient to say that the God of classical theism is at least (1) personal and incorporeal (without physical parts), (2) the Creator and Sustainer of everything else that exists, (3) omnipotent (all-powerful), (4) omniscient (all-knowing), (5) omnipresent (everywhere present), (6) immutable (unchanging) and eternal, and (7) necessary and the only God.
Let us now briefly look at each of these attributes.
1. Personal and Incorporeal. According to Christian theism, God is a personal being who has all the attributes that we may expect from a perfect person: self-consciousness, the ability to reason, know, love, communicate, and so forth. This is clearly how God is described in the Scriptures (e.g., Gen. 17:11; Exod. 3:14; Jer. 29:11).
God is also incorporeal. Unlike humans, God is not uniquely associated with one physical entity (i.e., a body). This is why the Bible refers to God as Spirit (John 4:24).
2. The Creator and Sustainer of Everything Else that Exists. In classical theism, all reality is contingent on God that is, all reality has come into existence and continues to exist because of Him. Unlike a god who forms the universe out of preexistent matter, the God of classical theism created the universe ex nihilo (out of nothing). Consequently, it is on God alone that everything in the universe depends for its existence (see Acts 17:25; Col. 1:16, 17; Rom. 11:36; Heb. 11:3; 2 Cor. 4:6; Rev. 4:11).
3. Omnipotent. God is also said to be omnipotent or all-powerful. This should be understood to mean that God can do anything that is (1) logically possible (see below), and (2) consistent with being a personal, incorporeal, omniscient, omnipresent, immutable, wholly perfect, and necessary Creator.
Concerning the latter, these attributes are not limitations of God's power, but perfections. They are attributes at their infinitely highest level, which are essential to God's nature. For example, since God is perfect, He cannot sin; because He is personal, He is incapable of making Himself impersonal; because He is omniscient, He cannot forget. All this is supported by the Bible when its writers assert that God cannot sin (Mark 10:18; Heb. 6:18), cease to exist (Exod. 3:14; Mal. 3:6), or fail to know something (Job 28:24; Ps. 139:17-18; Isa. 46:10a). Since God is a perfect person, it is necessarily the case that He is incapable of acting in a less than perfect way which would include sinning, ceasing to exist, and being ignorant.
When the classical theist claims that God can only do what is logically possible, he or she is claiming that God cannot do or create what is logically impossible. Examples of logically impossible entities include "married bachelors," "square circles," and "a brother who is an only child." But these are not really entities; they are merely contrary terms that are strung together and appear to say something. Hence, the fact that God cannot do the logically impossible does not in any way discount His omnipotence.
Also counted among the things that are logically impossible for God to do or create are those imperfect acts mentioned above which a wholly perfect and immutable being cannot do such as sin, lack omniscience, and/or cease to exist. Since God is a personal, incorporeal, omniscient, omnipresent, immutable, wholly perfect, and necessary Creator, it follows that any act inconsistent with these attributes would be necessarily (or logically) impossible for God to perform. But this fact does not count against God's omnipotence, since, as St. Augustine points out, "Neither do we lessen [God's] power when we say He cannot die or be deceived. This is the kind of inability...