You: Current University of Alabama students, faculty, and staff. If you are not a current University of Alabama student, faculty, or staff, you can use these databases from public computers in the University Libraries. For more information about access to and usage of databases, visit http://www.lib.ua.edu/databases/dbaccess.htm.

Or, for those interested in the nature of self and existence:

From Descartes: "the 'Cogito Argument' ('I am thinking, therefore I exist') - a self known only as a thinking thing, and known independently of the senses." Concise Routledge Encyclopedia of Philosophy. London: New York, 2000, p. 204.