Two quotes from “As a Man Thinketh” by James Allen – the gender references were made neutral:
Here is a rich person who is the victim of a painful and persistent disease as the result of gluttony. That person is willing to give large sums of money to get rid of it, but they will not sacrifice their gluttonous desires. That person wants to gratify their taste for rich and unnatural viands and have their health as well. Such a person is totally unfit to have health, because they have not yet learned the first principles of a healthy life.
… whilst aiming at a good end, this person is continually frustrating its accomplishment by encouraging thoughts and desires which cannot possibly harmonize with that end.