When you develop your opinions on the basis of weak evidence, you will have difficulty interpreting subsequent information that contradicts these opinions, even if this new information is obviously more accurate.
Nassim Nicholas TalebNever ask a trader if he is profitable: you can easily see it in his gesture and gait.
Nassim Nicholas TalebHe who has never sinned is less reliable than he who has only sinned once. And someone who has made plenty of errors-though never the same error more than once-is more reliable than someone who has never made any.
Nassim Nicholas Taleb