For a physicist mathematics is not just a tool by means of which phenomena can be calculated, it is the main source of concepts and principles by means of which new theories can be created.
Freeman DysonWe won't really understand the brain until we can make models of it which are analog rather than digital, which nobody seems to be trying very much.
Freeman DysonThe average ground temperature of the Earth is impossible to measure since most of the Earth is ocean...So this average ground temperature is a fiction.
Freeman Dyson