I don’t see the point in searching for an arche. I like a good mystery. Perhaps something is wrong with me, but I think that the world is more exciting to live in because of all the things we don’t know. Anyway, I think it’s interesting how the philosophers of ancient Greece used logic to keep advancing ideas. For example, the idea of water was rejected because it could never create fire, therefore it could not be the origin of everything. Then air was chosen by Anaximenes, and he added the ideas of condensation and rarefaction to explain the different forms air takes (for example, solids are just condensed air). This way he could explain how one element could create everything in nature. As time goes on and more scientific understanding of the world is gained, philosophical ideas advance with the times. And then eventually, the philosophic ideas might morph into ideas whose questions and answers are definite enough that instead of being philosophy, they switch into being physical sciences. Is there a science today that didn't start as philosophy?