"Probably the strongest influence on Buber's concept of realization, however, was the existentialist philosophy of Soren Kierkegaard. In Kierkegaard's earlier works are found the germ of some of Buber's most important early and later ideas: the direct relation between the individual and God in which the individual addresses God as 'Thou,' the insecure and exposed state of every individual as an individual, the concept of the 'knight of faith' who cannot take shelter in the universal but must constantly risk all in the concrete uniqueness of each new situation, the necessity of becoming a true person before going out to relation, and the importance of realizing one's belief in one's life. These similarities plus Buber's own treatment of Kierkegaard in his mature works make it clear that Kierkegaard is one of the most important single influences on Buber's thought."

“Aristotle's view that philosophy begins with wonder, not as in our day with doubt, is a positive point of departure for philosophy. Indeed, the world will no doubt learn that it does not do to begin with the negative, and the reason for success up to the present is that philosophers have never quite surrendered to the negative and thus have never earnestly done what they have said. They merely flirt with doubt.”

“If someone were to expound that godliness is to belong to childhood in the temporal sense and thus dwindle and die with the years as childhood does, is to be a happy frame of mind that cannot be preserved but only recollected; if someone were to expound that repentance as a weakness of old age accompanies the decline of one's powers, when the senses are dulled, when sleep no longer strengthens but increases lethargy-this would be ungodliness and foolishness.”

“There must have been many who had a relationship to Jesus similar to that of Barabbas (his name was Jesus Barrabas). The Danish "Barrabas" is about the same as "N.N." [Mr. X or John Doe], filius patris, his father's son. — It is too bad, however, that we do not know anything more about Barrabas; it seems to me that in many ways he could have become a counterpart to the Wandering Jew. The rest of his life must have taken a singular turn. God knows whether or not he became a Christian. — It would be a poetic motif to have him, gripped by Christ's divine power, step forward and witness for him.”

“Oh, can I really believe the poet's tales, that when one first sees the object of one's love, one imagines one has seen her long ago, that all love like all knowledge is remembrance, that love too has its prophecies in the individual. ... it seems to me that I should have to possess the beauty of all girls in order to draw out a beauty equal to yours; that I should have to circumnavigate the world in order to find the place I lack and which the deepest mystery of my whole being points towards, and at the next moment you are so near to me, filling my spirit so powerfully that I am transfigured for myself, and feel that it's good to be here.”

“There is a contrast of primary significance between Augustine and Pelagius. The former crushes everything in order to rebuild it again. The other addresses himself to man as he is. The first system, therefore, in respect to Christianity, falls into three stages: creation – the fall and a consequent condition of death and impotence; a new creation – whereby man is placed in a position where he can choose; and then, if he chooses – Christianity. The other system addresses itself to man as he is (Christianity fits into the world). From this is seen the significance of the theory of inspiration for the first system; from this also is seen the relationship between the synergistic and the semipelagian conflict. It is the same question, only that the syngeristic struggle has its presupposition in the new creation of the Augustinian system.”

“One could construe the life of man as a great discourse in which the various people represent different parts of speech (the same might apply to states). How many people are just adjectives, interjections, conjunctions, adverbs? How few are substantives, active verbs, how many are copulas? Human relations are like the irregular verbs in a number of languages where nearly all verbs are irregular.”