O. K. Bouwsma taught philosophy for over fifty years in the middle part of this century. The author presents through Bouwsma's published essays and his notebooks a philosophical understanding of this unique teacher of philosophy. Bouwsma, though not a famous philosopher, was, in the author's opinion, one of the most impressive philosophers of this century. His impressiveness did not come from awards and distinctions. It came from the philosophy which he did with his philosophical friends in discussions and in related notebooks. Among his friends were Wittgenstein, Moore, Malcolm, Lazerowitz, Ambrose, Anscombe, and scores of other graduate students. It was through his philosophizing with these friends, in his unique manner, that he became impressive and left his mark. Contents: O. K. Bouwsma: A Personal Recollection; Bouwsma's Paradox; Bouwsma's Twin Arts; Bouwsma and Moore: The Use of Analogy in Method; Without Proof or Evidence: Bouwsma and Kierkegaard; Bouwsma The Reader: A Philosophy of Education.