Ancient philosophers taught that an unexamined life is not worth living, and Gregory was highly introspective. He felt that a just person would look upon his life with anxiety, carefully considering whether he was growing or lessening in good every day, placing himself in front of himself and walking in his own company, seeing whether he was rising or flowing downwards.1 But some people can examine their lives more acutely than others, and some process of analysis of himself and others which we cannot trace made Gregory one of the masters in examining the motions of the human heart. His insight can be unnerving, and no reader will be under any illusion as to the difficulty of living in a manner which would have pleased him. But one cannot help feeling that the territory he describes is known from his own experience and inhabited by him, and that his demands are possible.