Life is sort of a circle. You come back to a lot of the interests that you had early in life.

Truth has many dimensions, and the way you arrive at truth in complex situations is through many perspectives.

As you know, in most areas of science, there are long periods of beginning before we really make progress.

I see psychoanalysis, art and biology ultimately coming together, just like cognitive psychology and neuroscience have merged.

There are cells in the brain that respond to faces. This is one of the reasons that I deal with portraiture. We can learn a lot about our perception of facial expression from the behavior of these cells.

Vienna is relatively small. And it had wonderful salons, opportunities for people to get together. There was a lot of interaction between scientists and non-scientists, between Jews and non-Jews, between artists, writers and scientists, including medical scientists.

I went to medical school after having decided to do so somewhere between my junior and senior year at Harvard - very late. I initially wanted to be an intellectual historian.