More from Knox chapter 3:
3. Once a man is integrated, once his inner life becomes simplified, all of a piece, he begins to attain a richer and deeper knowledge—quite effortlessly, because the intellectual light he receives comes from above. Freedom of heart is his, and simplicity of intention, and fixity of resolve, and he finds that he is no longer distracted by a variety of occupations; he acts, now, only for God’s glory, and does his best to get rid of all self-seeking.
There is no worse enemy to your freedom and your peace of mind than the undisciplined affections of your own heart. Really good and holy people plan out beforehand in their minds how they are to behave in given circumstances; the course of their lives does not sweep them away into following their lower instincts, they shape it for themselves, according to the dictates of right reason. To be sure, the conquest of self demands the hardest struggle of all; but this has got to be our real business in life, the conquest of self—no day passed without beating our own record, without gaining fresh ground.
4. We find no absolute perfection in this world; always there is a background of imperfection behind our achievement; and so it is that our guesses at the truth can never be more than light obscured by shadow. The humble man’s knowledge of himself is a surer way to God than any deep researches into truth. No reason why we should quarrel with learning, or with any straightforward pursuit of knowledge; it is all good as far as it goes, and part of God’s plan. But always what we should prize most is a clear conscience, and holiness of life. How is it that there are so many people who put knowledge first, instead of conduct? It means that they are constantly at fault, and achieve little—sometimes next to nothing. If only these people would take as much trouble to weed out their imperfections, and to cultivate good qualities, as they take over the learned theses they propound, we should hear less about sins and scandals, less about lax behaviour in religious houses. After all, when the day of judgement comes we shall be examined about what we have done, not about what we have read; whether we have lived conscientiously, not whether we have turned fine phrases.