Worry is essentially a misuse of imagination.
Most ideas are step-by-step children of other ideas.
If you go fishing you may not catch any fish. If you don't go fishing, you'll never catch any fish.
Necessity may be mother of invention, but fun is the father.
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.
Imagination is vital to precautionary judgement.