I felt strongly that since the pursuit of good science was so difficult it was essential that the problem being studied was an important one to justify the effort expanded.
The thing about science fiction is that it's totally wide open. But it's wide open in a conditional way.
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In teaching man experimental science results in lessening his pride more and more by proving to him every day that primary causes like the objective reality of things will be hidden from him forever and that he can only know relations.