Rene Descartes

All you need do is listen to very smart people and sift out the ideas that are unworthy or implausible, and I wouldn't pretend for a moment that I hadn't made lots of mistakes and there are companies, perhaps, that we had been investors in.

Lofty questions about the mind are fascinating to ask, philosophers have been asking them for three millennia both in India where I am from and here in the West - but it is only in the brain that we can eventually hope to find the answers.