Democritus Quote

By convention are sweet and bitter, hot and cold, by convention is color; in truth are atoms and the void.... In reality we apprehend nothing exactly, but only as it changes according to the condition of our body and the things that impinge on or offer resistance to it.

In: G.S Kirk and J.E. Raven, The Pre-Socratic Philosophers: A Critical History with a Selection of - Texts