Leap, and the net will appear.
If you think you can do it, you can.
Without hard work, nothing grows but weeds.
Things do not happen. Things are made to happen.
Be gentle to all and stern with yourself.
Know or listen to those who know.
Well done is better than well said.
If you're going through hell, keep going.
Be kind whenever possible. It is always possible.
Expect problems and eat them for breakfast.
I love the wry motto of the Paleontological Society, meant both literally and figuratively, for hammers are the main tool of our trade: Frango ut patefaciam - I break in order to reveal.