“It is perhaps permissible here to draw attention to a distinction made by Martin Heidegger, who speaks of the duality of calculating and reflective thought. Both modes of thought are legitimate and necessary, but for this very reason neither can be absorbed in the other. There must therefore be both: calculating thought, which is concerned with "makability," and reflective thought, which is concerned with meaning. And one cannot deny that the Freiburg philosopher has a good deal of justification for expressing the fear that in an age in which calculating thought is celebrating the most amazing triumphs man is nevertheless threatened, perhaps more than ever before by thoughtlessness, by the flight from thought. By thinking only of the practicable, of what can be made, he is in danger of forgetting to reflect on himself and on the meaning of his existence. Of course, this temptation is present in every age. Thus in the thirteenth century the great Franciscan theologian Bonaventure felt obliged to reproach his colleagues of the philosophical faculty at Paris with having learned how to measure the world but having forgotten how to measure themselves.”

“Nothing makes time pass or shortens the way like a thought that absorbs in itself all the faculties of the one who is thinking. External existence is then like a sleep of which this thought is the dream. Under its influence, time has no more measure, space has no more distance.”

“For I say to you in all the sadness of conviction, that to think great thoughts you must be heroes as well as idealists. Only when you have worked alone – when you have felt around you a black gulf of solitude more isolating than that which surrounds the dying man, and in hope and in despair have trusted to your own unshaken will – then only will you have achieved. Thus only can you gain the secret isolated joy of the thinker, who knows that, a hundred years after he is dead and forgotten, men who have never heard of him will be moving to the measure of his thought – the subtle rapture of a postponed power, which the world knows not because it has no external trappings, but which to his prophetic vision is more real than that which commands an army.”

“[T]he concern of man is not his future but his present, not the world but his soul. We must be just, we must strive, we must engage ourselves with the business of the world for our own sake, because through that, and through contemplation in equal measure, our soul is purified and brought closer to the divine. ... Thought and deed conjoined are crucial. ... The attempt must be made; the outcome is irrelevant. Right action is a pale material reflection of the divine, but reflection it is, nonetheless. Define your goal and exert reason to accomplish it by virtuous action; successs or failure is secondary.”

“A book can never be anything more than the impress of its author's thoughts; and the value of these will lie either in the matter about which he has thought, or in the form which his thoughts take, in other words, what it is that he has thought about it.”

“I had thought about everything carefully before I had agreed to him. I had made every preparation, every calculation, except for those two essentials that could not be calculated; his heart and mine.”