(John 1:3; Acts 17:24-25; Colossians 1:16-18; Genesis 1:1; Malachi 3:18; Revelation 21:6, 22:13; Psalm 135:6; Isaiah 48:11)
Since God knows that He alone is the reason, and since He is perfectly rational (indeed, He is the original rationality and the foundation and source of all derived rationality), when He conceives of His reason (which is always), His conception is the very image of Himself. This conception of Himself is the divine, eternal, personal reason for all things.
Nevertheless, the image is distinct from that which it is the image of, demonstrating that divinty is in fact shared between God and God's own reason, which is the very image of God.
This image, this reason (or logos), is Christ (Hebrews 1:3; John 1:1, 14:9).
God is the reason. He is His own reason. And therefore, He is clearly not unitarian.
This is one way we know that Islam is false: the god of Islam is unaware that his own reason is himself. This makes him irrational, and an irrational god cannot provide a justified reason for anything, making rational thought impossible if Islam (or any other unitarian religion) were true.
However, Islam is not true, and as a result, we have an alternative to being condemned for our crimes against God, namely, forgiveness through Jesus, the Son of God, the Logos or Reason of God, the Image of God. Jesus provided Himself as a substitution for us, taking the penalty we deserve so that we can be forgiven for our crimes against our Creator, and if we place our lives in His hands, we will be saved (James 4:8; 1 John 4:10; Romans 10:9, 10:13; John 1:12).
If, as you claim, morality is obeying god, how do you know that obeying god is good? Isn't that totally circular?
Are all presuppositions equally valid? If not, how does one determine which are more valid than others?
Isn't it the case that, rather than presupposing god as it claims to, the presuppositional view actually presupposes logic and reason?
What's an easy way to demonstrate that unitarianism is false?
Can you know anything independently of what god has revealed to you?