All this is contrary to nature, for the Creator has ordained the same natural way of life for both us and the animals. ‘Behold,’ says God to man, ‘I have given you every herb of the field, to serve as food for you and for the beasts’ (cf. Gen, 1:29-30). Thus we have been given a common diet with the animals; but if we use our powers of invention to turn this into something extravagant, shall we not rightly be judged more unintelligent than they? The animals remain within the boundaries of nature, not altering in any way what God has ordained; but we, who have been honored with the power of intelligence, have completely abandoned His original ordinance. Do animals demand a luxury diet? What chefs and pastry-cooks pander to their bellies? Do they not prefer the original simplicity, eating the herbs of the field, content with whatever is at hand, drinking water from springs – and this only infrequently? In this way they diminish sexual lust and do not inflame their desires with fatty foods. They become conscious of the difference between male and female only during the one season of the year ordained by the law of nature for them to mate in, so as to propagate and continue their species. The rest of the year they keep away from one another as if they had altogether forgotten any such appetite. In men, on the other hand, as a result of the richness of their food, an insatiable desire for sexual pleasure has grown up, producing in them frenzied appetites which never allow this passion to be still.
Since, then, possessions are the cause of great harm and, like a source of disease, they give rise to all the passions, we must eliminate this cause if we are really concerned for the well-being of our souls. Let us cure the passion of avarice through voluntary poverty. By embracing solitude let us avoid meeting those who do us no good, for the company of frivolous people is harmful and undermines our state of peace. Just as those who live in an unhealthy climate are generally ill, so those who spend their time with worthless men share in their vices.
—St. Neilos The Ascetic
Philokalia