In the Vedas it is stated that simply by understanding Krishna, one understands everything. One who is highly elevated in material education, cannot understand about anything spiritual. But one who is elevated highly in his spiritual education can understand anything material. In other words, all material things are dependent on the spiritual soul.
Correspondence, San Francisco,  September 1968

Our relationship is eternal. But if somebody lags behind, in spite of our eternal relationship one may not meet the other at the destination.

Just like a flock of birds - although very intimately related, each one of them has to fly in the sky by individual strength. If one is less strong, the others cannot keep him in the sky. That is the law of nature. So long as every one of us is strong in Krishna Consciousness, there is no doubt, you can fly in the spiritual sky and meet together without failure.

Therefore, individual strength is most important. And that individual strength is achieved in the association of devotees also.
- Correspondence, San Francisco,  September 1968

There is a verse in Vedic literature, Drabyamulyena Suddhati. The source of receipt of the thing, may be not very good, but if one pays for it, it becomes purified. So, vegetable diet when it is paid for, you can offer it in your mind to Krishna and take it.

But this Drabya means eatables, and eatables meaning vegetables, grains, milk, flowers, fruits; meat is not considered an eatable - it is considered untouchable. Just like if somebody purchases some stool, that does not mean it is now purified. So meat is like that... And this Drabyamulyena Suddhati is only in special cases like this.

It is not to be done ordinarily, or unless in special circumstance. We should prepare our own foodstuff and offer as much as possible, of course.
- Correspondence, Seattle,  October 1968

  Your body is dedicated to Krishna, therefore you should not be neglectful about your body. You should always think that your body is no more your body, but it is Krishna's body. Therefore you should take care of it.
Correspondence, Seattle,  October 1968

If you have got some time, the best thing would be to chant Hare Krishna more and more. Because our life is very short, we have to finish our Krishna Consciousness in this life very quickly.

We do not know when we shall meet our next death, our next exit from this platform. But before going out of this platform, we may try to finish Krishna Consciousness. That is our main business.
- Correspondence, Seattle,  October 1968

The ordinary physician may cure the disease of the body, but if you become advanced in Krishna Consciousness, you will be able to cure the disease of the soul for many many persons. And that is more important than a doctor or medical practitioner for curing the disease of this body.

However expert we may be in keeping this body fit, it is sure and certain that this will end. But if you can protect the soul from falling a victim of this material existence that is a greater service.
- Correspondence, Seattle, October 1968