Be thine own palace, or the world's thy jail.
The dog that trots about finds a bone.
Leap, and the net will appear.
Wherever you are - be all there.
The secret of getting ahead is getting started.
You never know what motivates you.
Quality is not an act, it is a habit.
Do not weep do not wax indignant. Understand.
Who seeks shall find.
The wise does at once what the fool does at last.
In hard-core science fiction in which characters are responding to a change in environment, caused by nature or the universe or technology, what readers want to see is how people cope, and so the character are present to cope, or fail to cope.