For there be an eternal, omniscient, omnipotent Being, it is certain that there is a God, whether you imagine that Being to be material or no.
 John Locke, An Essay Concerning Human Understanding (1689). copy citation

Context

“FIRST, Perhaps it will be said, that, though it be as clear as demonstration can make it, that there must be an eternal Being, and that Being must also be knowing: yet it does not follow but that thinking Being may also be MATERIAL. Let it be so, it equally still follows that there is a God. For there be an eternal, omniscient, omnipotent Being, it is certain that there is a God, whether you imagine that Being to be material or no. But herein, I suppose, lies the danger and deceit of that supposition:—there being no way to avoid the demonstration, that there is an eternal knowing Being, men devoted to matter, would willingly have it granted, that that knowing Being is material; and then, letting slide out of their minds, or the discourse, the demonstration whereby an eternal KNOWING Being was proved necessarily to exist, would argue all to be matter, and so deny a God, that is, an eternal cogitative Being: whereby they are so far from establishing, that they destroy their own hypothesis.” source