A moving clip of Dr Jacob Bronowski from his TV series in the 1970s, on the dangers of absolute certainty. Standing at Auschwitz he says

"When people believe that they have absolute knowledge with no test in reality, this is how they behave. This is what men do when they aspire to the knowledge of gods. Science is a very human form of knowledge, we are always at the brink of the known; we always feel forward for what is to be hoped. Every judgement in science stands on the edge of error and is personal."