When people thought the Earth was flat, they were wrong. When people thought the Earth was spherical they were wrong. But if you think that thinking the Earth is spherical is just as wrong as thinking the Earth is flat, then your view is wronger than both of them put together

...nor has any physical experiment ever proved that the Earth actually is in motion.

The failure of the many attempts to measure terrestrially any effects of the earth’s motion...

They thought the earth was flat—a little dishing if anything—that it was about five thousand years old, and that the stars were little sparkles made to beautify the night. The fact is that Christianity was in existence for fifteen hundred years before there was an astronomer in Christendom. No follower of Christ knew the shape of the earth.

For look: people used to think that the earth was flat. That was true, and still is today, of, say, Paris to Asniéres.
But that does not alter the fact that science demonstrates that the earth as a whole is round, something nobody nowadays disputes.
For all that, people still persist in thinking that life is flat and runs from birth to death.
But life, too, is probably round, and much greater in scope and possibilities than the hemisphere we now know.

As Hegel well knew, the ascent of reason has never followed a straight line.

New generations grew to maturity wholly ignorant of the sky that had transfixed their ancestors and that had stimulated the modern age of science and technology.

We are now in the middle of a long process of transition in the nature of the image which man has of himself and his environment. Primitive men, and to a large extent also men of the early civilizations, imagined themselves to be living on a virtually illimitable plane. There was almost always somewhere beyond the known limits of human habitation, and over a very large part of the time that man has been on earth, there has been something like a frontier...
Gradually, however, man has been accustoming himself to the notion of the spherical earth and a closed sphere of human activity. A few unusual spirits among the ancient Greeks perceived that the earth was a sphere. It was only with the circumnavigations and the geographical explorations of the fifteenth and sixteenth centuries, however, that the fact that the earth was a sphere became at all widely known and accepted. Even in the thirteenth century, the commonest map was Mercator's projection, which visualizes the earth as an illimitable cylinder, essentially a plane wrapped around the globe, and it was not until the Second World War and the development of the air age that the global nature of tile planet really entered the popular imagination. Even now we are very far from having made the moral, political, and psychological adjustments which are implied in this transition from the illimitable plane to the closed sphere.

All the sciences in the world never smoothed down a dying pillow. No earthly philosophy ever supplied hope in death.

None of them knew the color of the sky.

Even today there are deniers, sadly including the previous President of the United States and many of his followers – but then there are also people who argue that the world is flat.

If the earth were not round, heavy bodies would not tend from every side in a straight line towards the center of the earth, but to different points from different sides.

Some people do indeed say that Eratosthenes could not have inferred the true measure of the earth. Whether true or untrue, it cannot affect the truth of what I have written on the fixing of the quarters from which the different winds blow.

Flatness implied infinite extension, or at least a limitedness less inherent than that of the spherical, where every movement forward leads one step closer to the starting point.
Perhaps human values have yet to assimilate the earth’s shape. Although every physical evidence suggests that endless forward movement, endless growth, is impossible on a sphere, civilization is trying to grow endlessly. Our economics and politics are based on endlessness, and even our ideas of organic evolution, which of all things should have transcended flat-earth thinking, have an essential two-dimensionality.