Philosophy means the love of wisdom. The study of philosophy is an inquiry into the knowledge of general principles, a search after truth. Since there are many kinds of wisdom and many truths, it follows that there are many philosophies. From its broadest viewpoint the average man's philosophy is his opinion about life. The philosophy of a religious man is his opinion of the relationship between God and man. The philosophy of a businessman constitutes his speculative thought about economics. Philosophical knowledge is an attempt to establish for us a rational explanation of things as they are.