The twelve essays in this collection promote scholarship on the rich and diverse subject of mysticism by examining the nature of its thought both from Eastern and Western and from philosophical and religious perspectives. These include studies of specific mystics, including Teresa de Avila, Lady Nijo, Hiroshi Motoyama, and Mirabai, and thinkers about mysticism, including Kant, Nietzsche, and Wittgenstein. The book opens with two descriptive studies of similarities in the life of Teresa de Avila and mystics of very different times and cultures. The issue of mysticism and ethics is addressed in three essays, and central concepts involving pure conscious events and primordial oneness in Nietzsche are addressed in two separate essays. Wittgenstein's comments on mysticism are examined in two essays, one that places them in the perspective of his overall development and the other that studies them in comparison with recent continental thought. The book concludes with two essays that look broadly at the supersensible, one from an examination of Kantian aesthetics and the other from quantum mechanical interpretations of reality. Taken together, these essays attest to the power of mysticism to provoke reasoned thought about ultimate matters.