Thanks for the quotes. Here's a few more for the collective perusal:

Personally, I'm always ready to learn, although I do not always like being taught.
Winston Churchill

There are three classes of people: Those who see. Those who see when they are shown. Those who do not see.
Leonardo da Vinci

Three things cannot be long hidden: the sun, the moon, and the truth.
Buddha

And by the way, thanks for the Jimmy Durante memory a few posts ago.