Acknowledgments i Abbreviations ii Part One Preface 2 I. Introduction 6 II. The Essence of the Ta-ch'eng ch'i-hsin lun 26 III. Biography of Wonhyo 45 IV. Wonhyo's Bibliography 58 V. Wonhyo's Thought 73 VI. Conclusion 84 Notes to Part One 92 Part Two I. Introduction to Translation 115 II. Translation 120 Notes to Translation 186 Appendix 250 Bibliography 253