"When the first edition of this collection of remarks appeared in 1961 we were provided with a glimpse of the workings of Wittgenstein's mind during the period when the seminal ideas of the Tractatus Logico-Philosophicus were being worked out. This second edition provided the occasion to be struck anew by the breadth, rigor, and above all the restlessness of that mind."--T. Michael McNulty, S. J., The Modern Schoolman