13. Truth. Our last reason for studying logic is the simplest and most important of all. It is that logic helps us to find truth, and truth is its own end: it is worth knowing for its own sake.
Logic helps us to find truth, though it is not sufficient of itself to find truth. It helps us especially (1) by demanding that we define our terms so that we understand what we mean, and (2) by demanding that we give good reasons, arguments, proofs.
Truth is worth knowing just for the sake of knowing it because truth fulfills and perfects our minds, which are part of our very essence, our deep, distinctively human core, our very selves. Truth is to our minds what food is to our bodies. [Adapted from Kreeft, Socratic Logic]