Calvin's commentary on 2 Corinthians 8:15
". . . [H]e has enjoined upon us frugality and temperance, and has forbidden, that anyone should go to excess, taking advantage of his abundance. Let those, then, that have riches, whether they have been left by inheritance, or procured by industry and efforts, consider that their abundance was not intended to be laid out in intemperance or excess, but in relieving the necessities of the brethren."