To acknowledge past perceptual error, to confess intellectual mistake, and to retrace one's steps accordingly may be bad policy for politicians, but it is sound policy for truth-seekers. The superficial or the conceited may feel that they lose in character thereby, but the earnest and the humble will, on the contrary, know that they gain.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 467