Convince a man never so much, that plenty has its advantages over poverty
 John Locke, An Essay Concerning Human Understanding (1689). copy citation

Context

“But yet, upon a stricter inquiry, I am forced to conclude that GOOD, the GREATER GOOD, though apprehended and acknowledged to be so, does not determine the will, until our desire, raised proportionably to it, makes us uneasy in the want of it. Convince a man never so much, that plenty has its advantages over poverty; make him see and own, that the handsome conveniences of life are better than nasty penury: yet, as long as he is content with the latter, and finds no uneasiness in it, he moves not; his will never is determined to any action that shall bring him out of it.” source