Philosophy is the foundation of everything. Or to put it more accurately, philosophy--specifically that branch of philosophy called metaphysics--is the study of the foundation of everything. So I think it's important (See The Anatomy of Success elsewhere on this blog).
The term metaphysics probably comes from Aristotle. In the first collection of his lectures, the chapter on what he called the study of First Philosophy came right after the one on physics. In Greek, meta means "after," thus the field of First Philosophy is called Metaphysics today, so one theory goes.
Zen and the Art of Motorcycle Maintenance,by Robert Persig, is one of my favorite books. And one of the biggest contributions that book makes is toward a better understanding of early philosophical thought for us normal folk.