'A Knowledgeable Approach to Truth' is Volume I of a projected two-volume 'collected essays' and, as suggested by the title, it puts some store by the utilization of knowledge in the pursuit of truth, however one might wish to interpret such a loaded term. This particular volume contains essayistic material right from the beginning of John O'Loughlin's commitment to philosophy in 1977, viz. the first four essays, the first of which has been lifted from 'Between Truth and Illusion' and the other three from 'The Illusory Truth', both of which were heavily into dualism. Then comes a substantial number of essays from a 1979 collection entitled 'The Fall of Love', some of which owe more to Spenglerian historicism than to dualistic relativity, and, after one essay culled from 'The Transcendental Future' (1980), namely "The Ultimate Purpose" which, though indubitably essayistic, served as an introduction to the title in question, we conclude with all the material, including an aphoristic appendix, that is to be found in 'The Way of Evolution' (1981), most of which, like the aforementioned essay and indeed the title of which it was originally a part, is beyond both dualism and Spenglerian historicism in what, for the author, amounted to an intellectual 'rebirth', in which life became interpreted in relation to a transcendent goal as the product of an evolutionary resolve that owed something, though not everything, to the estimable likes of Friedrich Nietzsche and Teilhard de Chardin. Such, in brief, is the scope of this first volume, which paves the way for the second and more advanced volume to follow in which not knowledge but truth, conceived in unequivocally transcendental terms, is the main motive and operative factor.