An A-to-Z collection of thoughtful aphorisms and ruminations by the philosopher and founder of the Philosophical Library.   In this unique dictionary, philosopher Dagobert D. Runes attempts to define the contours of human thinking and morality. In a series of terms organized alphabetically, Runes systematically sets out his own musings on topics ranging from Abhorrence and Ability to Zeal, Zen, and Zero.   Each word is followed by up to several single-sentence aphorisms and occasionally a short essay. In his search for real verities and true humanity, Runes takes the reader on a thought-provoking voyage through the depths of the human mind. This is philosophy as intellectual soul-searching, unburdened by traditional manner and terminology. Sometimes baffling and frequently melancholy, it is always fascinating and inspiring.