The same may be said of pride and of covetousness, and of such other, for thou mayest live though thou wert not proud at all, nor covetous, nor luxurious, and therefore thou shalt labour to destroy the very feelings of them as much as thou canst, and so seek to cleanse and take away the very ground of those sins. But in gluttony it is otherwise, because the ground thereof, which is natural appetite and need, must remain as long as thou livest, therefore must thou only arise and fight against the unreasonable desires of thy natural appetite therein, the which do creep in under pretense, and by occasion of the said just and reasonable need; smite these unreasonable stirrings, and keep the ground whole. (John Climacus)

It may be lack of humility, but I see the whole range of Maslow's hierarchy as dealing with natural appetite.

We need food and drink, so we can be tempted to gluttony. We need self-esteem and self-actualization, so we can be tempted to pride.

For each and every need we must fight against the unreasonable desires of our natural appetites.

To recognize these unreasonable desires we must cultivate our reason. To keep the ground whole we must be honest, especially with ourselves, regarding our motivation and purpose.

To avoid temptation and achieve wholeness we must receive the grace of God.