There are many fortunate persons all over the world, and many unfortunate persons also. So those who are fortunate, they're taking to this Krsna consciousness, this ideal life, hopeful life, pleasant life, blissful life, life of knowledge. They're taking to it. But it is the duty of Vaisnava to go door to door to make them fortunate. Although they are unfortunate, but you have to go door to door to make them fortunate. That is your duty.

 [Srimad-Bhagavatam lecture in New York, 21 July 1971]

Suppose a man accidentally comes in contact with our society and gives some service willingly or unwillingly, that is the beginning of his fortunate life. We go from door to door canvassing people to join Krsna Consciousness movement means that we are trying to make them fortunate.

[Letter to Tosana Krsna, 13 November 13, 1968]

 Upendra: What was the secret of speaking nicely on the philosophy of Krsna consciousness?

Srila Prabhupada: Speaking or anything, all depends on practice and study. I remember when I was first called for speaking by one of my senior Godbrothers. I felt very much hesitating because I was not practiced to speak. Later on, by speaking and hearing or reading, I got experience and now we can speak 45 minutes, 50 minutes or 1 hour at a stretch. So you have to read our books very nicely and gather thoughts, and then you can speak for hours without any difficulty. It requires practice. So read your books carefully. Especially Nectar of Devotion, now published, and practice speaking. It will be alright.

• Krsna is variety. There are varieties of Krsna's manifestation. Krsna is there. Krsna personally is there. At the same time, Krsna, energy, they are varieties. Parasya saktir vividhaiva sruyate [Cc. Madhya 13.65, purport]. Krsna is one, but His energies are multi-different energies. So you can take shelter of different energies or Krsna directly. The best thing is to take shelter of Krsna directly. That is intelligence. Therefore Krsna says, sarva-dharman parityajya mam ekam saranam vraja [Bg. 18.66].

• But we prefer to take shelter of Krsna's energy. That is also external energy, this material nature. So Krsna has given us chance. You can work hard in this material energy, but that will not help you. Therefore, those who are devotees, they also take shelter of Krsna's energy. That is internal energy, not external energy. Internal. Mahatmanas tu mam partha daivim prakrtim asritah [Bg. 9.13]. Daivim prakrtim means internal energy.

• Just like you cannot avoid government control. That is not possible. Either you are in jail life or you are in free life, you are always under government control. Similarly, either we remain in the material world or we remain in the spiritual world, we are controlled by Krsna. There is no escape. You cannot do that. But if you remain controlled by the spiritual energy, by directly being controlled by Krsna, not by His energy, or by His internal energy, then you will be happy. That is the ambition of persons who are in Krsna consciousness.

 >>> Ref. VedaBase => Bhagavad-gita 4.11 -- Vrndavana, August 3, 1974