It is part of Zeno’s Paradoxes by Zeno of Elea, a Greek philosopher from the 5th century BCE. They challenge our understanding of motion, infinity, and continuity—and they’ve tripped up mathematicians and philosophers for over two thousand years.
Statement: Before you can walk a distance, you have to get halfway there. But before you get halfway, you have to get a quarter of the way. And before that, an eighth… and so on infinitely.