Includes bibliographical references.

Technology and responsibility: reflections on the new tasks of ethics.--Jewish and Christian elements in philosophy: their share in the emergence of the modern mind.--Seventeenth century and after: the meaning of the scientific and technological revolution.--Socio-economic knowledge and ignorance of goals.--Philosophical reflections on experimenting with human subjects.--Against the stream: comments on the definition and redefinition of death.--Biological engineering--a preview--Contemporary problems in ethics from a Jewish perspective.--Biological foundations of individuality.--Spinoza and the theory of organism.--Sight and thought: a review of "visual thinking."--Change and permanence: on the possibility of understanding history.--The gnostic syndrome: typology of its thought, imagination, and mood.--The hymn of the pearl: case study of a symbol, and the claims for a Jewish origin of gnosticism.--Myth and mysticism: a study of objectification and interiorization in religious thought.--Origen's metaphysics of free will, fall, and salvation: a "divine comedy" of the universe.--The soul in gnosticism and Plotinus.--The abyss of the will: philosophical meditations on the seventh chapter of Paul's epistle to the Romans.