"So anyone who is chanting Hare Krsna, he is in samadhi. Anyone who is cooking for Krsna, he is in samadhi. Anyones who is typing for Krsna, he is in samadhi. Anyone who is working in the field for Krsna, he is in samadhi. Because his consciousness is that "I am doing here for satisfaction of Krsna." Anukulyena krsnanusilanam. Anusilanam, cultivation of Krsna knowledge favorably, not unfavorably. Then it is perfection. Bhaktir uttama. Anukulyena. Anyabhilasita-sunyam. When you cook, if you think, "Oh, this nice thing is being cooked. I shall eat it very nicely," then it is not Krsna. But while cooking, if you think, "Let me do it very nicely so that Krsna will taste it," it is Krsna consciousness. The same thing. Activities is the same, but the consciousness is different. That is samadhi.
So samadhi is not very extraordinary thing. One has to become simply serious and sincere to Krsna. Then he is in samadhi. That is confirmed in the Bhagavad-gita..."
Srila Prabhupada Lecture on Srimad-Bhagavatam, 06-13-69, New Vrindaban
As discussed in the "Regulative Principles" section of the website, spiritual vegetarianism can be viewed from various angles. Some practice karma vegetarianism in order to avoid the karmic burden that results from causing suffering to other living entities who are killed simply in order to satisfy the senses. The Vedic understanding of dharma puts vegetarianism in the context of civilized human society, wherein the practices of different classes of people are regulated according to varna and asrama. While some individuals may be expected to eat meat, others are strictly forbidden from eating meat except under the most dire of circumstances. In all cases, the protection of cows is of absolute importance. Here in the West, one of the most popular motivations for vegetarianism is health and fitness. While all these approaches to vegetarianism produce certain benefits, Krsna Conscious vegetarianism is on the topmost platform. The devotee of the Lord is naturally vegetarian because he only takes the remnants of foodstuffs that have first been offered to Krsna - and Krsna is the Supreme Vegetarian.
"No India, of India, don't talk of India. Talk of the philosophy. If there is no devotion, Krsna does not accept anything, either in India or in your country. It is not... Krsna's not obliged to accept anything costly because it is very tasteful. Krsna has many tasteful dishes in Vaikuntha. He's not hankering after your food. He accepts your devotion. That out of... Bhaktya, tad aham asnami. Bhaktya upahrtam, real thing is devotion. Not the food. Krsna does not accept any food of this material world. But He accepts only the devotion. Patram puspam phalam toyam yo me bhaktya prayacchati, tad aham asnami bhaktya upahrtam. "Because it has been offered to Me with devotional love," that is required. One who has no devotional love, from his hand... Therefore we do not allow anyone to cook who is not a devotee. Krsna does not accept anything from the hands of a non-devotee. Why should He accept? He's not hungry. He does not require any food. He accepts only the devotion. That's all. That is the main point. So one has to become a devotee, not a good cooker. But if he's a devotee, then he'll be a good cook also. Yasyasti bhaktir bhagavaty akincana sarvair gunais tatra samasate surah. Automatically he'll become a good cook. Therefore one has to become devotee only; then all other good qualification will automatically be there. And if he's a nondevotee, any good qualification has no value."
Srila Prabhupada Conversation, 02-27-72, Mayapur
"A good example of how we commit sins unknowingly is cooking. In the Bhagavad-gita (3.13) Krsna says that His devotees are freed from sin because they eat only the remnants of food that has been offered to Him. But, He says, those who cook for themselves eat only sin. The difference between cooking here in this temple and cooking in some ordinary house is that our cooking and eating are relieving us from sin, while the cooking and eating of a nondevotee are simply entangling him more and more in sin. The cooking appears to be the same, but this cooking and that cooking are different. Here there is no sin because the food is being cooked for Krsna.
Anything you do outside the field of Krsna conscious activities entangles you in the modes of nature. Generally, you are being implicated in sinful activities. Those who are a little more cautious avoid sinful activities and perform pious activities. But one who performs pious activities is also entangled. If a man is pious, he may take birth in a family that is very rich or aristocratic, or he may be very beautiful or get the opportunity to become very learned. These are the results of pious activities. But whether you are pious or impious, you have to enter into the womb of some mother. And that tribulation is very severe. That we have forgotten. Whether you take birth in a very rich and aristocratic family or from an animal womb, the pangs of birth, old age, disease, and death continue.
The Krsna consciousness movement is meant to give you an opportunity to solve these four problems--birth, old age, disease, and death. But if you continue to act sinfully and eat sinfully, then these miseries will continue."
Laws of Nature, Chapter 1
"To practice the regulative principles of bhakti-yoga one should, under the guidance of an expert spiritual master, follow certain principles: one should rise early in the morning, take bath, enter the temple and offer prayers and chant Hare Krsna, then collect flowers to offer to the Deity, cook foodstuffs to offer to the Deity, take prasadam, and so on. There are various rules and regulations which one should follow. And one should constantly hear Bhagavad-gita and Srimad-Bhagavatam from pure devotees. This practice can help anyone to rise to the level of love of God, and then he is sure of his progress into the spiritual kingdom of God. This practice of bhakti-yoga, under the rules and regulations, with the direction of a spiritual master, will surely bring one to the stage of love of God."
Bhagavad-gita 12:9 Purport
Bhaktivedanta Book Trust. HDG A.C. Bhaktivedanta Swami Srila Prabhupada.