"If you want to render service to God, it cannot be checked at any circumstance. Nobody can say that 'Because I am poor, I cannot serve God.' No. God can be served both by the poor and the rich without any difficulty, because it is not material affair.
When there is material transaction, if I want to purchase something, then I must have the requisite money to purchase. It is conditioned. But if you want to render service to God, or Kṛṣṇa, there is no condition. Therefore ahaituky apratihatā: 'It cannot be checked.' Because I am born in particular type, particular time or particular country, I cannot render service to Kṛṣṇa—that's not a fact. Anywhere, any part of the world, any part of the universe, any man, in any condition, he can serve Kṛṣṇa. There is no impediment. Ahaituky apratihatā. And when that type of religion is followed, to serve the Supreme Absolute without any motive and without any impediment, then you will be happy. Yayātmā suprasīdati.
You are wanting happiness, peace. So if you try, if you learn how to love Kṛṣṇa without any motive and without any impediment, then you will be happy. This is the program of Kṛṣṇa consciousness, to make everyone happy."
(Srila Prabhupada Lecture, Montreal, August 2, 1968)