It's always too early to quit.
Wherever you are - be all there.
The dog that trots about finds a bone.
Always desire to learn something useful.
By failing to prepare, you are preparing to fail.
If you're going through hell, keep going.
Never complain and never explain.
If you think you can do it, you can.
To know oneself, one should assert oneself.
The wise does at once what the fool does at last.
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.