This expanded edition of James Ellington's preeminent translations of Grounding for the Metaphysics of Morals and Metaphysical Principles of Virtue includes his new translation of Kant's essay On a Supposed Right to Lie Because of Philanthropic Concerns, in which Kant replies to one of the standard objections to his moral theory, as presented in the main text of Grounding, that it requires us to tell the truth even in the face of harmful consequences.