A testimony of my personal Christian faith. Defense below.
Hermeneutics - How to study, interpret, understand and apply Scripture using the method used throughout most of Christian history and as is intended by Scripture itself. Grammatical-historical hermeneutic.
Reformed Theology - Justification and Sanctification, Doctrine and Creeds.
Discernment - How not to be deceived in a world filled with deception
Epistemology - the philosophy of knowledge and Truth
Eschatology - Last things.
Confessions - The power of Christian discernment across generations as a help to apply Scripture.