why is mathematics so effective in describing natural phenomena? i cannot understand why would nature obey mathematics? It seems that if i define mathematically, for example, the rate of cooling of an substance, than no matter what mathematical operation i do on the formula (allowed by mathematics) and come to another new mathematical expression, new relationship, i would find nature actually exhibiting the derived behavior. How can this be if mathematics are invented by people? Is mathematics some way fundamental to nature? (how and why). I would like to post some detailed question, but im jsut stunt with the fact as i stated it. Is there any theory (philosophical) on this. I was thinking about this while reading a quote from einstain, which in my opinion is the most profound thing (obvious, but not realized by many), that "Theory determines what we observe".