(Srila Prabhupada in Montreal, 1968)
"The material scientists are fond of always improving this or that, but factually we see there is no real improvement. As soon as one trouble is eliminated, another is there. If we have cars to go faster and faster, then where are the roads for it, and so many people are killed. But real improvement means how to please Krishna more and more. That is real advancement, real progress. Actually, because you have surrendered to Krishna, you are already perfect. But it is just like the ocean; we can swim forever and never reach the shore. Similarly, there is no limit to perfection—we may go on improving more and more, and still there is no limit to how much we may please Krishna, just like for the materialist there is no limit to how much Maya can kick us!
We should always be enthusiastic to try for shooting the rhinoceros. That way, if we fail, everybody will say, Never mind, nobody can shoot a rhinoceros anyway, and if we succeed, then everyone will say, Just see, what a wonderful thing they have done."
(Srila Prabhupada Letter, December 22, 1971)