Quote by Democritus: “Nothing exists except atoms and empty space; everything else is opinion.”

Democritus famously reduced reality to its most fundamental components: indivisible particles (atoms) and the void they move in. This assertion means that sensory experiences and abstract concepts are subjective interpretations, emphasizing a radical materialist view of the universe where objective reality is purely physical.

Democritus, a key figure in the development of atomism, offered a groundbreaking scientific explanation for the world. His theory contrasted sharply with earlier metaphysical ideas, proposing a universe composed solely of physical entities.

Greek philosopher from Abdera who lived approximately 460–370 BCE. He developed — along with his teacher Leucippus — the earliest atomic theory, proposing that all matter is made of indivisible particles. He was also a prolific moral philosopher, earning the nickname 'the Laughing Philosopher' for his cheerful temperament.