How Many Black Circles?

"Another difficulty is that those who depend more on their imperfect senses cannot realize Him as the Supreme Lord. Such persons are like the modern scientist. They want to know everything by their experimental knowledge. But it is not possible to know the Supreme Person by imperfect experimental knowledge. He is described herein as adhoksaja, or beyond the range of experimental knowledge. All our senses are imperfect. We claim to observe everything and anything, but we must admit that we can observe things under certain material conditions only, which are also beyond our control."

SB 1.8.19