"Our relationship is eternal. But if somebody lags behind, so in spite of our eternal relationship one may not meet other at the destination. Just like a flock of birds -- although very intimately related, every one of them has to fly in the sky by individual strength. If one is less strong, the other cannot keep him in the sky. That is the law of nature."
(Srila Prabhupada Letter, September 20, 1968)
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