“If someone in your life talked to you the way you talk to yourself, you would have left them long ago.”

To be wrong is nothing unless you continue to remember it.

Knowledge rests not upon truth alone, but upon error also.

A subtle thought that is in error may yet give rise to fruitful inquiry that can establish truths of great value.

There is only one corner of the universe you can be certain of improving, and that's your own self.

Important principles may, and must, be inflexible.

We choose our joys and sorrows long before we experience them.

Faith in oneself is the best and safest course.