By failing to prepare, you are preparing to fail.
Leap, and the net will appear.
What you do today can improve all your tomorrows.
Be thine own palace, or the world's thy jail.
It's always too early to quit.
The wise does at once what the fool does at last.
Who seeks shall find.
Know or listen to those who know.
Expect problems and eat them for breakfast.
Always desire to learn something useful.
It's amazing that something only an atom thick can be an impenetrable barrier. You can have gas on one side and vacuum or liquid on the other, and with a wall only one atom thick, nothing would go through it.