A handy short definition of almost all science fiction might read: realistic speculation about possible future events, based solidly on adequate knowledge of the real world, past and present, and on a thorough understanding of the nature and significance of the scientific method.
Money problems can always be solved by a man not frightened by them.
In handling a stinging insect, move very slowly.
One should not attend even the end of the world without a good breakfast.
Belief gets in the way of learning.
I believe in the honest craft of workmen.