Bright, however, as is the manifestation which God gives both of himself and his immortal kingdom in the mirror of his works, so great is our stupidity, so dull are we in regard to these bright manifestations, that we derive no benefit from them…but we are all alike in this, that we substitute monstrous fictions for one living and true God…almost every man has had his own god. To the darkness of ignorance have been added to presumption and wantonness, and hence there is scarcely an individual to be found without some idol or phantom as a substitute Deity. Like water gushing forth from a large and copious spring, immense crowds of gods have issued from the human mind, every man giving himself full license, and devising some peculiar form of divinity, to meet his own views.
– John Calvin
as quoted by Sproul, R.C.; Grace Unknown: The Heart of Reformed Theology; Baker Books; Grand Rapids, MI; copyright 1997; p. 40