Thomas Aquinas

The human thought adopts many forms and aspects, even in the transcendental field. But all they contain similar forms and rules; for instance, if theology is a necessary and really existing science.

To know certain thing, object or discipline, always you start by knowing its qualities or properties. So, see which those properties of Theology are. These properties are essentially of two aspects: absolute, exclusive, and fit to theology itself; and relative, complementing it and especially fit to human sciences in general.