Term I

Idol, Idolatry
      An idol is a representation of something in the heavens or on the earth. It is used in worship and is often worshiped. It is an abomination to God (Exodus 20:4). Idolatry is bowing down before such an idol in adoration, prayer, or worship. In a loose sense, idolatry does not necessitate a material image or a religious system. It can be anything that takes the place of God: a car, a job, money, a person, a desire, etc. Idolatry is denounced by God at the beginning of the Ten Commandments and is considered a form of spiritual fornication.

Immaculate Conception
     The teaching that Mary was conceived without original sin.  Typically believed as true in Roman Catholicism. 

Image of God
     Man was made in the image of God (Gen. 1:26).  The image of God is generally held to mean that people contain within their nature elements that reflect God's nature:  compassion, reason, love, hate, patience, kindness, self-awareneness, etc.  Though we have a physical image, it does not mean that God has one.  Rather, God is spirit (John 4:24), not flesh and bones (Luke 24:39).

Immutability
      The divine attribute of unchangeableness. God said in Exodus 3:14, "I AM that I AM," signifying His eternal sameness and His sovereignty. He cannot change His moral character, His love, His omniscience, omnipresence, omnipotence, etc.  God is "From everlasting to everlasting," (Psalm 90:2).
      Immutability does not mean that God does not vary. The incarnation is just such an example of variation. Also, God's attitude toward a person is changed when the person becomes a Christian. For example, the enmity between God and man is removed (Rom. 5:10).
      Mormonism denies the immutability of God. It says that God was not always God, that He was a man on another planet who became a God (Mormon Doctrine, by Bruce McConkie, p. 321.).

Immortality
     Life without death anytime in the future.  God is immortal.  The souls of people are immortal though their bodies are not.  All people can die in a physical sense but they continue on after death.  Therefore, it is the soul that is immortal.  However, after the return of Christ and the resurrection, the Christians' bodies will also become glorified and immortal (1 Cor. 15:50-58). The wicked will likewise be resurrected to immortality but they will be cast into hell for eternity.

Impute, Imputation
      To reckon to someone the blessing, curse, debt, etc. of another. Adam's sin is imputed to all people (Rom. 5:12-21), therefore, we are all guilty before God. Our sins were put upon, imputed, to Jesus on the cross where He became sin on our behalf (2 Cor. 5:21) and died with them (Isaiah 53:4-6). Therefore, our sins are forgiven. Understanding imputation is very important. Imputation is the means of our salvation. Our sins were put upon, imputed, to Jesus on the cross. Our sins were "given" to Jesus. When He died on the cross, our sins, in a sense, died with Him. The righteousness that was His through His perfect obedience to the Father in His complete obedience to the Law is imputed, given, to us. In short, our sins were given to Jesus. His righteousness was given to us. Technically speaking our sins were imputed to Jesus. His righteousness was imputed to us.

In facto
     Something that exists and is complete.

In fieri
     Beginning to be, but not yet complete.

Incarnation
      The addition of human nature to the nature of God the second person of the Trinity. It is where God became a man (John 1:1,14; Phil. 2:5-8). It was the voluntary act of Jesus to humble Himself so that He might die for our sins (1 Pet. 3:18). Thus, Jesus has two natures: Divine and human. This is known as the Hypostatic Union.
      The doctrine is of vital importance to the Christian. By it we understand the true nature of God, the atonement, forgiveness, grace, etc. It is only God who could pay for sins. Therefore, God became man (John 1:1,14) to die for our sins (1 Pet. 2:24) which is the atonement. Through Jesus we have forgiveness of sins. Since we are saved by grace through faith (Eph. 2:8-9) it is essential that our object of faith be accurate. The doctrine of the incarnation ensures accuracy, the knowledge that God died on the cross to atone for sin and that the God-man (Jesus) is now in heaven as a mediator (1 Tim. 2:5) between us and God.
      Jesus came to reveal the Father (Matt. 11:27; Luke 10:22), to do His will (Heb. 10:5-9), to fulfill prophecy (Luke 4:17-21), to reconcile the world (2 Cor. 5:18-21), and to become our High Priest (Heb. 7:24-28). (Contrast with Kenosis.)

Induction 
     A system of logic where specific facts are used to draw a general conclusion.

Indulgence  
     In Catholicism, a means by which the Catholic church takes away some of the punishment due the Christian in this life and/or purgatory because of his sin.  

Inerrancy
     Without error, non-errant. In Christianity, inerrancy states that the Bible, in its original documents, is without error regarding facts, names, dates, and any other revealed information. Inerrancy does not extend to the copies of the biblical manuscripts.

Infant baptism
     The practice of baptizing infant children of believing parents. In the Catholic Church infant baptism washes away original sin and is regenerative. In Reformed circles, infant baptism is not regenerative but covenantal and validated through the believing parent(s). There are no explicit accounts of infant baptism in the Bible. However, it cannot be completely excluded as a possibility given that entire households were baptized Acts 16:15,  33; 18:8.

Infidel 
     A person who does not believe in any particular religious system.

Infinity
     The state or quality of being infinite, unlimited by space or time, without end, without beginning or end. God is infinite in that He is not limited by space or time. He is without beginning and without end (Psalm 90:2).

Infralapsarianism
     An issue within Reformed theology dealing with what may have happened in God's mind regarding the logical order of His considering whom to elect into salvation before the foundation of the world.  The word means "after the fall."  The position is that God first decided he would allow sin into the world and second that he would then save people from it.  By contrast, the supralapsarian ("before the fall") position holds that God first decided that he would save some people and then second that he would allow sin into the world.  

Inspiration
      The doctrine that the Bible was written by the influence of God. It is, therefore, without error. It is accurate and authoritatively represents God's teachings (2 Tim. 3:16). As such it is a revelation from God which implies direct knowledge about God, creation, man, salvation, the future, etc. It is an illumination in that it shows us what we could not know apart from it.
      One of the ways to prove that the Bible is inspired is to examine the O.T. prophecies fulfilled in the N.T. concerning Jesus (Luke 24:27-45). Because the Bible is inspired, its words are unbreakable (John 10:34-36), eternal (Matt. 24:35), trustworthy (Psalm 119:160), and able to pierce the heart of man (Heb. 4:12). Additionally, the inspired Word of God will not go forth without accomplishing what God wishes it to (Isaiah 55:11).

Intermediate state
     The period between death and resurrection. The condition of the person in the intermediate state is debated. One theory is that the person is without a body, yet is conscious, and that he will receive his body at the resurrection. Another theory states that the person has a different sort of spiritual body that will be lost at the resurrection when body and soul are reunited (2 Cor. 5:1-4).