The only real knowledge we can have of God is contained in the Scriptures; and hence, if we are deprived of them, we are deprived of God.

   The infidel may tell us that God is to be known in creation. Did anyone ever find Him out there? No doubt, creation does prove the existence of a Creator, as we read in the first chapter of the epistle to the Romans, “The invisible things of Him from the creation are clearly seen, being understood by the things that are made, even His eternal power and Godhead; so that they are without excuse.” Creation yields a testimony which the heathen were bound to receive, and, had they received it, a higher light would assuredly have shone upon them. But they did not receive it, nay, they actually worshipped the things that were made, instead of the One Who made them. Philosophers talk of rising from nature up to nature’s God. But nature is a ruin, and man himself a ruin in the midst of ruin; and instead of rising to nature’s God, he makes a god of nature, and degrades himself below the level of a beast. See Romans 1:21-32.

Letters to a Friend - C.H. Mackintosh