Another way to put it; how does Lucretius justify the claim that 'the eyes don't develop in order to let you see'?
Aristotle makes a clear distinction between each of his five causes. The first cause, or prime mover, which you could say is God. Then four proximate causes;
- The material cause. What is it made of?
- The efficient cause. How was it made?
- The formal cause. What shape does it take? (Echoes of Plato and his forms on this one)
- And the final cause. Why was it made? What is its purpose? What end (telos) does its existence serve?