"If we take everything into account — not only what the ancients knew, but all of what we know today that they didn't know — then I think that we must frankly admit that we do not know. But, in admitting this, we have probably found the open channel."
Richard Feynman, "The Value of Science," public address at the National Academy of Sciences (Autumn 1955); published in What Do You Care What Other People Think (1988); republished in The Pleasure of Finding Things Out: The Best Short Works of Richard P. Feynman (1999) edited by Jeffrey Robbins.
I found the "open channel" metaphor obscure from just the quote, and found some context. The open channel is a contrast to the blind alley of seizing to a single belief that may be wrong.
I noticed that later in the passage, he says:
...It is our responsibility to leave the men of the future with a free hand. In the impetuous youth of humanity, we can make grave errors that can stunt our growth for a long time. This we will do if we, so young and ignorant, say we have the answers now, if we suppress all discussion, all criticism, saying, 'This is it
Another month, another rationality quotes thread. The rules are: