How do Christians account for universal, immaterial, unchanging laws?
Christians account for universal, immaterial, unchanging laws as they reflect the very nature of God.
The Bible accounts for immaterial entities as in John 4 vs. 24 it states: "God is spirit, and his worshippers must worship in spirit and in truth."
In Malachi 3 vs. 6 God says "I the Lord do not change." accounting for His unchanging nature.
Psalm 90 vs. 2 states: "Before the mountains were born or you brought forth the earth and the world, from everlasting to everlasting, you are God." and Psalm 139 vs. 7 - 10 states: "Where can I go from your Spirit? Where can I flee from your presence? If I go up to the heavens, you are there; if I make my bed in the depths, you are there. If I rise on the wings of the dawn, if I settle on the far side of the sea, even there your hand will guide me, your right hand will hold me fast," accounting for God's universality.
The laws of logic, mathematics, science, and morality, reflect the thinking and character of God and what He has created in order to accomplish His purposes.
In Jeremiah 33 vs. 25 God speaks of how He has 'fixed the laws of heaven and earth.' These universal, immaterial, unchanging laws are the basis for all knowledge and are rooted in God's word. The apostle Paul said in his letter to the Colossians: My purpose is that they may be encouraged in heart and united in love, so that they may have the full riches of complete understanding, in order that they may know the mystery of God, namely, Christ, in whom are hidden all the treasures of wisdom and knowledge." (Chapter 2 vs. 2 - 3)
Of course everyone uses universal, immaterial, unchanging laws, but many do so denying their only possible source. Christianity proclaims the source which can be summarized with Christ's declaration: "apart from me you can do nothing." (John 15 vs. 5)