Grains, fruits, milk and similar foods are allotted for human consumption. One should not be excessively eager to satisfy the tongue and eat that which is not meant for humanity
SB Canto 3
For his income a devotee should be satisfied with what he earns without great difficulty. He should not eat more than what is necessary. He should live in a secluded place and always be thoughtful, peaceful, friendly, compassionate and self-realized.
Everyone who has accepted a material body must maintain the necessities of the body by acting or earning some livelihood. A devotee should only work for such income as is absolutely necessary. He should be satisfied always with such income and should not endeavor to earn more and more simply to accumulate the unnecessary. A person in the conditioned state who has no money is always found working very hard to earn some with the object of lording it over material nature. Kapiladeva instructs that we should not endeavor hard for things which may come automatically, without extraneous labor. The exact word used in this connection, yadṛcchayā, means that every living entity has a predestined happiness and distress in his present body; this is called the law of karma. It is not possible that simply by endeavors to accumulate more money a person will be able to do so, otherwise almost everyone would be on the same level of wealth. In reality everyone is earning and acquiring according to his predestined karma. According to the Bhāgavatam conclusion, we are sometimes faced with dangerous or miserable conditions without endeavoring for them, and similarly we may have prosperous conditions without endeavoring for them. We are advised to let these things come as predestined. We should engage our valuable time in prosecuting Kṛṣṇa consciousness. In other words, one should be satisfied by his natural condition. If by predestination one is put into a certain condition of life which is not very prosperous in comparison to another's position, one should not be disturbed. He should simply try to utilize his valuable time to advance in Kṛṣṇa consciousness. Advancement in Kṛṣṇa consciousness does not depend on any materially prosperous or distressed condition; it is free from the conditions imposed by material life. A very poor man can execute Kṛṣṇa consciousness as effectively as a very rich man. One should therefore be very satisfied with his position as offered by the Lord.
Another word here is mita-bhuk. This means that one should eat only as much as necessary to maintain the body and soul together. One should not be gluttonous to satisfy the tongue. Grains, fruits, milk and similar foods are allotted for human consumption. One should not be excessively eager to satisfy the tongue and eat that which is not meant for humanity. Particularly, a devotee should eat only prasāda, or food which is offered to the Personality of Godhead. His position is to accept the remnants of those foodstuffs. Innocent foods like grains, vegetables, fruits, flowers and milk preparations are offered to the Lord, and therefore there is no scope for offering foods which are in the modes of passion and ignorance. A devotee should not be greedy. It is also recommended that the devotee should be muni, or thoughtful; he should always think of Kṛṣṇa and how to render better service to the Supreme Personality of Godhead. That should be his only anxiety. As a materialist is always thoughtful about improving his material condition, a devotee's thoughts should always be engaged in improving his condition in Kṛṣṇa consciousness; therefore he should be a muni.
The next item recommended is that a devotee should live in a secluded place. Generally a common man is interested in pounds, shillings and pence, or materialistic advancement in life, which is unnecessary for a devotee. A devotee should select a place of residence where everyone is interested in devotional service. Generally, therefore, a devotee goes to a sacred place of pilgrimage where devotees live. It is recommended that he live in a place where there is no large number of ordinary men. It is very important to live in a secluded place (vivikta-śaraṇa). The next item is śānta, or peacefulness. The devotee should not be agitated. He should be satisfied with his natural income, eat only as much as he needs to keep his health, live in a secluded place and always remain peaceful. Peace of mind is necessary for prosecuting Kṛṣṇa consciousness.
The next item is maitra, friendliness. A devotee should be friendly to everyone, but his intimate friendship should be with devotees only. With others he should be official. He may say, "Yes, sir, what you say is all right," but he is not intimate with them. A devotee should, however, have compassion for persons who are innocent, who are neither atheistic nor very much advanced in spiritual realization. A devotee should be compassionate towards them and instruct them as far as possible in making advancement in Kṛṣṇa consciousness. A devotee should always remain ātmavān, or situated in his spiritual position. He should not forget that his main concern is to make advancement in spiritual consciousness, or Kṛṣṇa consciousness, and he should not ignorantly identify himself with the body or the mind. Ātmā means the body or the mind, but here the word ātmavān especially means that one should be self-possessed. He should always remain in the pure consciousness that he is spirit soul and not the material body or the mind. That will make him progress confidently in Kṛṣṇa consciousness.