Heavy Metal

The wheel was discovered around 5000 years ago.
During the age of wagons & chariots, it may have never occurred to anyone that putting two wheels in line with each other would be a practical thing.
But finally in 1817 the bicycle was invented, and that idea led to the motorcycle, and doing backflips:
Focus on situations with change potential:
This approach requires serious commitment. Development requires time. The secret is to invest a few moments every day to maximize learning.”
Development First by David Peterson & Mary Dee Hicks
I glanced round the bus.
Though the windows were closed, and soon muffed, the bus was full of light. It was cruel light.
I shrank from the faces and forms by which I was surrounded. They were all fixed faces, full not of possibilities but of impossibilities, some gaunt, some bloated, some glaring with idiotic ferocity, some drowned beyond recovery in dreams; but all, in one way or another, distorted and faded.
One had a feeling that they might fall to pieces at any moment if the light grew much stronger. Then-there was a mirror on the end wall of the bus – I caught sight of my own.
And still the light grew.
The Great Divorce by C. S. Lewis