3.4.7   Among such as these, in that unsettled age of mine, learned I books of eloquence, wherein I desired to be eminent, out of a damnable and vainglorious end, a joy in human vanity. In the ordinary course of study, I fell upon a certain book of Cicero, whose speech almost all admire, not so his heart. This book of his contains an exhortation to philosophy, and is called "Hortensius." But this book altered my affections, and turned my prayers to Thyself O Lord; and made me have other purposes and desires. Every vain hope at once became worthless to me; and I longed with an incredibly burning desire for an immortality of wisdom, and began now to arise, that I might return to Thee. For not to sharpen my tongue (which thing I seemed to be purchasing with my mother's allowances, in that my nineteenth year, my father being dead two years before), not to sharpen my tongue did I employ that book; nor did it infuse into me its style, but its matter.