This command, which of course applies to the will as well as other things, is universal. It implies, if we must deny ourselves in great things, we must deny ourselves also in those which are small. Such are the laws of the human mind, that indulgence in the latter will take away our strength, and deprive us of victory in the former. Deny thyself, therefore, in small things; subject thy will, in matters of minor importance, that thou mayest have power to conquer in things which are more difficult.
— edited and adapted from A Treatise on Divine Union (1851) Part 5, Chapter 5.