Necessity may be mother of invention, but fun is the father.
Imagination is vital to precautionary judgement.
Worry is essentially a misuse of imagination.
If you go fishing you may not catch any fish. If you don't go fishing, you'll never catch any fish.
Whatever creative success I gained was due to my belief that creative power can be stepped up by effort, and that there are ways in which we can guide our creative thinking.
Often when economic pressure is lifted, a man must pump back into himself a feeling of must.