Reasoning is compared to understanding as movement is to rest, or acquisition to possession.... Since movement always proceeds from something immovable, and ends in something at rest, hence it is that human reasoning, in the order of inquiry and discovery, proceeds from certain things absolutely understood--namely, the first principles; and, again, in the order of judgment, returns by analysis to first principles, in the light of which it examines what it has found. Now it is clear that rest and movement are not to be referred to different powers, but to one and the same.
Thomas AquinasIf, then, you are looking for the way by which you should go, take Christ, because He Himself is the way.
Thomas AquinasMercy without justice is the mother of dissolution; justice without mercy is cruelty.
Thomas Aquinas