It will be no excuse to an idle and untoward servant, one who would not attend his business by candlelight, to plead that he had not bright sunshine. The candle, that is set up in us, shines bright enough for our purposes…If we will disbelieve everything, because we cannot certainly know all things, we shall do muchwhat as wisely as he who would not use his legs, but sit still and perish, because he had no wings to fly.
John Locke, An Essay Concerning Human Understanding, Introduction, 5
Whilst the light of nature does not give us all truth, yet it is sufficient to make to us our duty to others and God.
“For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.” Romans. 1.20