Corruption, the most infallible symptom of constitutional liberty.
Edward Gibbon
We are not final because we are infallible, but we are infallible only because we are final.
Robert Jackson
Need we add that mathematicians themselves are not infallible?
Henri Poincare
We are none of us infallible not even the youngest of us.
William Hepworth Thompson
No man is infallible.
Pat Buckley