"Regarding your several questions: Where are the spirit souls coming from that are taking microbe bodies? It is not a matter of any particular body. These spirit souls and all spirit souls are coming from Vaikuntha, but in these material worlds they are taking various grades of bodies according to their material activities. There is no 'new' soul. 'New' and 'old' are due to this material body, but the soul is never born and never dies, so if there is no birth how there can be new soul?
Your second question: Is there any particular reason why some spirit souls become directed toward Krsna Consciousness in the first place? How does one get on the progressive path of elevation to Krsna Consciousness? The answer is that it is by the mercy of the Lord that one comes in contact with a Spiritual Master Who can revive the dormant Krsna consciousness of the conditioned soul. Krsna is always merciful and He comes Himself, He leaves behind Him instruction like the Bhagavad Gita, etc. and He sends His representative, the Spiritual Master. In this way the merciful propaganda is going on.
Every individual soul has got the discriminating power, so those who are pious they take advantage of this opportunity of the mercy of the Lord. But both pious and impious souls are being convinced by this Krsna consciousness movement. The human being is supposed to be intelligent more than the animals, so the intelligent persons or pious persons are coming in contact with Krsna consciousness.
Regarding your questions with reference to B.G. III,5, and the Vedic hymn quoted in the purport to B.g. 14.15 and the statement '. . . when the living entity is bewildered in his desires, the Lord allows him to fulfill those desires . . .' You have quoted, 'The Lord engages the living entity in pious activities so he may be elevated. The Lord engages him in impious activities so he may go to hell . . .' So that is also originally the individual soul's desire and as Supersoul the Lord is giving everyone the opportunity to go to heaven or to hell or to Vaikuntha if he so desires. For those who are hankering after material opportunities the Lord as Supersoul is giving them the opportunities to enjoy the material nature and the facility is being supplied by the material nature.
Similarly, a living entity who is desiring for spiritual upliftment, the Lord is giving him the opportunity of the Vedic literatures and the Spiritual Master. But His advice to all living entities is to give up all nonsense and everything else and surrender unto Him. The living entity by accepting one kind of opportunity is going to hell and by accepting the other kinds of opportunities he is going back to home, back to Godhead. So both opportunities are offered by the Lord. Therefore indirectly you can say that one is being sent to hell and one is being sent to the spiritual world by the Lord—but He is simply supplying the opportunities to everyone as he desires. The intelligent person therefore does not desire anything—he simply surrenders unto the Lord or he desires to serve the Lord and that is his greatest opportunity.
'Man proposes and God disposes.' That is the sum and substance. But as a pure devotee of the Lord you should not propose—simply accept His proposal and surrender unto Him. So far the conditioned soul is concerned the same opportunities are there, but if he does not take advantage of the opportunity to elevate himself to Krsna Consciousness and chooses to misuse his independence for taking the opportunity to enjoy some material happiness, then he will remain conditioned as the Lord will allow him to fulfill those desires. The opportunity is always there, just as we are offering so many ways to become Krsna Conscious, but if you don't take the opportunity what can I do. That is purposeful negligence of duty. The example may be given of a man who is sleeping. If he is actually sleeping, he may be wakened by various means, but there is no doubt that he must wake up. However, if a man is pretending to be asleep there is no way at all to rouse him up."
(Srila Prabhupada Letter, July 9, 1970)
"Regarding your questions: Hindu means the culture of the Indians. India happens to be situated on the other side of the Indus River which is now in Pakistan which is spelled Indus—in Sanskrit it is called Sindhu. The sindhu was misspelled by the Europeans as Indus, and from Indus the word 'Indian' has come. Similarly the Arabians used to pronounce sindus as Hindus. This Hindus is spoken as Hindus. It is neither a Sanskrit word nor is it found in the Vedic literatures. But the culture of the Indians or the Hindus is Vedic and beginning with the four varnas and four asramas. So these four varnas and four asramas are meant for really civilized human race. Therefore the conclusion is actually when a human being is civilized in the true sense of the term he follows the system of varna and asrama and then he can be called a 'Hindu.' Our Krsna Consciousness Movement is preaching these four varnas and four asramas, so naturally it has got some relationship with the Hindus. So Hindus can be understood from the cultural point of view, not religious point of view. Culture is never religion. Religion is a faith, and culture is educational or advancement of knowledge.
Regarding your second question how to convince the young persons who are thinking that Meher Baba is an avatara. it is very difficult to deal with these misguided people. If you meet sincere people you may inform them that we are concerned with Krsna Who is historically 5,000 years old. So any other party who comes from India or any part of the world cannot claim such long history as far back as 5,000 years. There are sometimes manufactured avatar. in the history of the Vedic literature, but we don't accept them. We take the oldest one which is genuine—that is Krsna consciousness. We are not interested in anything newly manufactured. If Meher Baba or for the sake of that, any other Baba claims to be Krsna, so why any intelligent man will go to the substitute leaving aside the original?"
(Srila Prabhupada Letter, July 9, 1970)
"You have inquired whether to illustrate Balaramaji's Rasa Dancing with expansions of Balaramaji just like Krsna expanded Himself for Rasa Dancing. No, we do not find such description in the Srimad Bhagavatam. But He had His dancing pastime with the Gopis in a different place known as Ramghat on the bank of the Yamuna."
(Srila Prabhupada Letter, July 11, 1970)
"Regarding your question—What does it mean: 'We are all originally Krsna conscious entities.'—We are always with Krsna. Where is not Krsna present? So how you can say that we were before? You are always with Krsna and when we forget this fact we are far, far away from Him. In the Isopanisad it is clearly stated that tad dure tad vantike 'He is very away, but He is very near as well.' (Iso. mantra 5). So this forgetfulness is our falldown. It can take place at any moment, and we can counteract this forgetfulness immediately rising to the platform of Krsna consciousness."
(Srila Prabhupada Letter, July 15, 1970)