All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.
It should be noted that children at play are not playing about; their games should be seen as their most serious-minded activity.
Every man has within himself the entire human condition
It is the mind that maketh good or ill, That maketh wretch or happy, rich or poor.
Only the fools are certain and assured.
Make your educational laws strict and your criminal ones can be gentle; but if you leave youth its liberty you will have to dig dungeons for ages.
On the highest throne in the world, we still sit only on our own bottom.
Donald Trump does not stick to Republican orthodoxy, which, you know, and this is always supposed to have been his downfall. Maybe it's his strength.
The nuclear arms race has no military purpose. Wars cannot be fought with nuclear weapons. Their existence only adds to our perils.
I'm the only person I know who's got a bunch of money.
A book with the genuine power to stir and comfort its readers.