A Text in Deductive Logic Preface

I entered college knowing that I wanted to major in philosophy, and I had prepared myself by trying to read as much philosophy as I could before college. But with little guidance, I found philosophy to be a confusing tangle of texts, positions, methods, and history.  Still, I thought I knew what I liked and didn't like, and I was sure that I didn't like logic and mathematics, or anything which used symbols. 
 
I took an introductory logic course, a course similar to this one, in my first semester of college, hoping to get the logic requirement over with.  I wasn't prepared for what happened next: I discovered that the subject matter of logic was philosophically interesting, and that it raised interesting questions about the nature of human reason, language and thought, and necessity.  How do words refer to things? What does it mean to say that two expressions have the same meaning?  What is the difference between the form of a proposition and its content? How can there be propositions which are true just in virtue of their form?  I got hooked on these questions, and found that logic wasn't a subject to be covered and dismissed, but rather a window into philosophy and other intellectual domains. Before I knew what was happening, I was reading things like Wittgenstein's Tractatus Logico-Philosophicus. A fellow philosophy major and friend told me that the more logic I knew, the deeper would be my understanding of philosophical issues.  I hope you will discover the wisdom of that insight.