Human beings are not perfectible. They are improvable.

Byfailing to prepare you are preparing to fail.

There'sno point in arguing with partisan supporters. Their views are their identity.Nothing you can tell the most phlegmatic follower.

People whoare too concerned with how well they are doing will be less successful andfeel less competent than those who focus on the task itself... Somepsychologists call it a conflict between egoorientation, or between extrinsicand intrinsic motivation...

You can't unscramble an egg.

It is no profit to have learned well, if you neglect to do well.

Modesty is the clothing of talent.

When weblame, we give away our power.

Wherethe tongue slips, it speaks the truth.

Conflictis the gadfly of thought. It stirs us to observation and memory. Itinstigates to invention. It shocks us out of sheeplikepassivity, and sets us at noting and contriving.

We owealmost all our knowledge not to those who have agreed but to those who havediffered.

A teleision set is like a toaster. You press a button and the same thing pops up almost every time.