Not to be absolutely certain is, I think, one of the essential things in rationality.
Bertrand RussellMy own view on religion is that of Lucretius. I regard it as a disease born of fear and as a source of untold misery to the human race. I cannot, however, deny that it has made some contributions to civilisation. It helped in early days to fix the calendar, and it caused Egyptian priests to chronicle eclipses with such care that in time they became able to predict them. These two services I am prepared to acknowledge, but I do not know of any others.
Bertrand RussellThe pure mathematician, like the musician, is a free creator of his world of ordered beauty.
Bertrand RussellThe fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.
Bertrand Russell