The wise does at once what the fool does at last.
Know or listen to those who know.
If you think you can do it, you can.
If you're going through hell, keep going.
Be gentle to all and stern with yourself.
The dog that trots about finds a bone.
I can, therefore I am.
If you've got a talent, protect it.
Without hard work, nothing grows but weeds.
Either you run the day or the day runs you.
One of the nice things about science fiction is that it lets us carry out thought experiments.
Some ideas you have to chew on, then roll them around a lot, play with them before you can turn them into funky science fiction.