We got together in a few days a company of the toughest old salts imaginable--not pretty to look at, but fellows, by their faces, of the most indomitable spirit.
The process of finding the truth may not be a process by which we feel increasingly better and better. It may be a process by which we look at things honestly, sincerely, truthfully, and that may or may not be an easy thing to do.
Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but to vigorous debate, and in many respects that's the secret of its success.
What a photograph shows us is how a particular thing could be seen, or could be made to look - at a specific moment, in a specific context, by a specific photographer employing specific tools.