Hebrews 11:3 (NASB)
By faith we understand that the world has been created by the word of God so that what is seen has not been made out of things that are visible.
Nowhere is faith more necessary than when it comes to understanding God's creation. God and His creation can't be theorized, rationalized, or explained by theoretical or particle physics, quantum mechanics, doppler shift, paleontology, or other disciplines. If God could be explained by logic, there would be no need for faith.
As an engineer, I marvel at how the things I design transform life. But I'm yet to explain the miracle of rebirth or the resurrection of Christ. As Christians, we have to leave room for the supernatural. God has set Himself and His mysteries, including His creation, above human reach so that we would reach out to Him by faith. When we explain God's creation scientifically, we oversimplify His omnipotence (Job 38:2), ripping His divinity, power, and holiness out (2 Timothy 3:5-7) and making Him a benevolent but symbolic head.
God exalted Himself into the highest heavens, so we mere mortals reach out to Him by faith, not by logic.