Problems are not stop signs, they are guidelines.
Know or listen to those who know.
Who seeks shall find.
Be kind whenever possible. It is always possible.
If you can dream it, you can do it.
Be gentle to all and stern with yourself.
Well done is better than well said.
By failing to prepare, you are preparing to fail.
Quality is not an act, it is a habit.
If you're going through hell, keep going.
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.