It's always too early to quit.
Do not weep do not wax indignant. Understand.
Never complain and never explain.
If you can dream it, you can do it.
Be gentle to all and stern with yourself.
Quality is not an act, it is a habit.
Be kind whenever possible. It is always possible.
What you do today can improve all your tomorrows.
Expect problems and eat them for breakfast.
The wise does at once what the fool does at last.
Science fiction is an amazing literature: plot elements that you would think would be completely worn out by now keep changing into surprising new forms.