My wife shared this with me, something se saw posted on Facebook. I found it interesting.
Brain Substance of all men is not Equal”
Prabhupada: In psychology there is study brain substance. Brain substance of all men are not equal.
Svarupa Damodara: Yes. I think it is known because when Einstein died they tried to preserve the brain of Einstein. Thinking that his brain was different from others.
Prabhupada: If it was not different then how he became distinguished?
Svarupa Damodara: The brain substance is different just like everybodys intelligence different.
Prabhupada: Yes. According to the brain substance there is difference of intelligence. ( Morning Walk — September 23, 1972, Los Angeles)