His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even... knowledge, was foolproof.
He who labors diligently need never despair; for all things are accomplished by diligence and labor.
Things are only impossible until they're not.
People were still cramming down the stairs, and more were squeezing past the turnstiles and down the escalators onto the platforms, but it was clear to me that this wasn't going to have a happy ending.
The cloning of humans is on most of the lists of things to worry about from Science, along with behaviour control, genetic engineering, transplanted heads, computer poetry and the unrestrained growth of plastic flowers.
A hobby a day keeps the doldrums away.
Wisdom is knowing what to do next; virtue is doing it.