After writing the last post, I picked up my reading of Richard Sibbes, and immediately came across this:
" Truth is truth, and error, error, and that which is unlawful is unlawful, whether men think so or not. God has put an eternal difference between light and darkness, good and ill, which no creature’s conceit can alter; and therefore no man’s judgement is the measure of things further than it agrees to truth stamped upon things themselves by God. ... [Wise men] are usually immovable as the sun in its course, because they think and live and speak by rule." (The Bruised Reed, chapter 12).