1001Philosophers

Peter Geach Quotes

Peter Thomas Geach was a British philosopher of logic, language, and metaphysics, husband and long philosophical companion of Elizabeth Anscombe, and for most of his career professor at the University of Leeds. A devout Roman Catholic, he combined a strong commitment to traditional Thomistic metaphysics with the most exacting standards of modern formal logic. The quotes below are attributed to Peter Geach, organized by topic.

Peter Geach on God

  • Attributed to Peter Geach:

    “God's existence is the most important truth that philosophy can establish.”

Peter Geach on Knowledge

  • Attributed to Peter Geach:

    “Logic is the science of valid inference, not a substitute for thought.”

Peter Geach on Truth

  • Attributed to Peter Geach:

    “Truth has no degrees.”

Read all Peter Geach quotes on Truth

Peter Geach on Virtue

  • Attributed to Peter Geach:

    “There is no such thing as good in general; goodness is always relative to a kind.”

  • Attributed to Peter Geach:

    “What is to be morally evaluated is the human action, not its consequences alone.”