Abstract
In the foreground of Father Lonergan's analysis of the cognitional process are insight and the heuristic structures it employs. A close study of paradigms of insight exhibits mental acts apprehending intelligibilities logically distinct from, though psychologically conveyed by sense data and images. Because these intelligibilities, e.g., in contemporary physics, bear witness to entities which are unimaginable, knowing is not merely looking. Knowing involves entertaining intelligible meanings and reflecting on them, and though it exists, for men at least, within the boundaries of sensible experience, knowing in its primary activity as insight goes beyond the empirical presentations to grasp intelligible meanings and to judge reflectively their truth or falsity. When judging, a rational self-consciousness affirms a proposition, i.e., an intelligible meaning, in view of its sufficient reason or grounds. In this sense affirmative judgment renders the conditioned "virtually unconditioned" by linking it up with its conditions, as structures immanent and operative within the cognitional process effectuate this linkage of the conditioned with its conditions. These structures, which Father Lonergan supposes he can express as rules for the construction of situations which give rise to insight so that method and not genius suffices to gain truth, are held to be constitutive of the acts of insight and understanding. Accordingly, the positive content of Insight is summed up in the slogan: "Thoroughly understand what it is to understand, and not only will you understand the broad lines of all there is to be understood but also you will possess a fixed base, an invariant pattern, opening upon all further developments of understanding".