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Reasons For Believing in the God of Christian Theism

The One True God:

Westminster Shorter Catechism
Q5: Are there more Gods than one?
A5: There is but one only, the living and true God.
But why do we believe that there is only one God?
  • Jer. 10:2-10, vs. 10 being the verse that the shorter catechism probably drew "living and true God".  Notice the context dealing with idolatry.
  • Deut. 6:4 - also referred to as the Jewish "Shema".  Given when Moses gives the law a 2nd time.
  • Is. 45:5-6
  • Mark 12:28-31 - Jesus repeats Deut. 6 when asked about the greatest commandment.
  • Rom. 3:30
  • 1 Cor. 8:4
  • 1 Tim. 2:5
  • James 2:19
Q: Give examples of when our reason for believing in one true God might be challenged by an unbelieving world?  Hinduism, New Age, etc.

His Perfections:

Westminster Shorter Catechism
Q4: What is God?
A4: God is a Spirit, infinite, eternal, and unchangeable, in his being, wisdom, power, holiness, justice, goodness, and truth.

Here the Catechism is referring to God's attributes or perfections.  A whole study on the attributes of God could be inserted here.  Man suppresses the knowledge of God in several ways.
  • by ascribing to man an attribute that only belongs to God (e.g. sovereignty), thereby making himself equal with God
  • by denying to God any of His attributes.  This should rightly be understood as a direct attack against the glory of God.
  • by ascribing to God any attribute that He does not declare that He possesses (e.g. God's universal love for all man kind)
Therefore, it is absolutely essential - indeed, it is a vital imperative for our spiritual health - that we creatures should always listen carefully to God's description of himself in Holy Scripture alone, submit our hearts to that description without murmuring against it, endeavor to live our lives in accordance with it, and worship Him in a way that befits his revealed perfections, that is, with reverence and awe (Heb. 12:28). - Robert Reymond, Faith's Reasons For Believing, p. 294

Q: How is our conception of God involved in worship?  Why is our understanding of His perfections important?
Q: Read Heb. 12:25-29.  What are some important elements of true worship?  How does worship sometimes become sinful?
Q: How is Arminianism, for example, an attack against God?

We should not think we do God service by attempting to prove to the unbeliever that just any God exists.  The unbeliever does not need this proven to him anyway; he already knows this.  What is far more important, as we shall see, and what the unbeliever needs is that we tell him what God is. - Robert Reymond, Faith's Reasons For Believing, p. 295-296.

Why does it do no service to God to attempt to "prove" to the unbeliever that just any God exists?  How do evidentialists do this today and what mistake do they make when they argue from a starting point outside of scripture?

His Triunity:

Westminster Shorter Catechism
Q6: How many persons are there in the Godhead?
A6: There are three persons in the Godhead; the Father, the Son, and the Holy Ghost; and these three are one God, the same in substance, equal in power and glory.
  • Isaiah 48:16 - awesome passage that mentions all three persons.  How do we know the person speaking is God the Son?
  • Isaiah 61:1
  • Matthew 28:19 - Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,
  • John 14:16-26; 15:26; 16:7-15 - shows all three persons as distinct
  • Romans 8:1-11
  • 2 Corinthians 13:14 - good one that shows all three persons as distinct
  • Gal. 4:4-6
  • Eph. 1:3,14; 2:18; 4:4-6
  • 2 Thess. 2:13-14
  • Titus 3:4-6 - "God our Savior appeared"
  • 1 Peter 1:2
  • Jude 20-21
We are not limited just to passages that show all three persons in the same verse.  Any passage that demonstrate the divinity of Christ and the distinct personhood of the Holy Spirit are enough to demonstrate the doctrine of the Trinity.

Use of theos as a Christological title:
  • Acts 20:28 - "church of God which He purchased with His own blood"
  • Romans 9:5
  • Titus 2:13
  • Hebrews 1:8
  • 2 Peter 1:1
  • John 1:1; 1:18; 20:28
  • 1 John 5:20
  • Matt. 13:34-35 in conjunction with Ps. 78:1-2
Q: Why are we Trinitarian?  What's at stake if we loose the Trinity?  Is it of salvific importance and why?
Q: Is the Trinity a contradiction?  Are the persons of the Trinity one God in the same sense as they are different persons?

For a more in depth study of the Trinity see Trinity.  Also see Arianism for more information on how to respond to those who reject Christ's deity.

His Creatorship:

The Bible shows us that God created all things out of nothing (also the Latin, ex nihilo).
  • Gen 1-2
  • Heb. 1:2; 11:3
God also, contrary to the deist, continues to actively preserve and uphold all things.
  • 1 Cor. 8:6
  • Col. 1:15-17
  • Acts 17:28
All that ever has or will happen, happens because God has determined and ordained it.
  • Ps. 115:3
  • Dan. 4:35
  • Acts 2:23; 4:27-28
  • Rom. 9:11-23
  • Eph. 1:3-14
  • 1Pet 1:20
Q: How do men deny God's creatorship?  How do they deny His preserving and upholding all things?  How is this an offense against God?
Q: Many professing Christians deny God's sovereignty.  What are they really doing when they deny His sovereignty?
Q: How do we often sin by not recognizing God's providence in all things?
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