The first thing one should know about philosophy is that, just like with religion, there is not one but many philosophies. That’s on a general level. Besides th

The first thing one should know about philosophy is that, just like with religion, there is not one but many philosophies. That’s on a general level. Besides that, there is philosophy of science, philosophy of mathematics, historical philosophy, perhaps even philosophy of philosophy. Much of studying philosophy, unlike in sciences and mathematics, consists of the study of its history (which is a fun subject in its own right).