1001Philosophers

Joseph Priestley Quotes

Joseph Priestley was an English natural philosopher, theologian, and political theorist, and one of the founding figures of English Unitarianism. Best known to the history of science as the discoverer of oxygen and several other gases, he was equally significant as a defender of civil and religious liberty in support of the American and French Revolutions. The quotes below are attributed to Joseph Priestley, organized by topic.

Joseph Priestley on Freedom

  • Attributed to Joseph Priestley:

    “Nothing in human life is more valuable than civil and religious liberty.”

  • Attributed to Joseph Priestley:

    “All progress depends on the freedom of inquiry.”

Joseph Priestley on God

  • Attributed to Joseph Priestley:

    “Reason and revelation, both gifts of God, cannot truly conflict.”

Joseph Priestley on Knowledge

  • Attributed to Joseph Priestley:

    “Education has the most extensive influence on human happiness.”

Read all Joseph Priestley quotes on Knowledge

Joseph Priestley on Truth

  • Attributed to Joseph Priestley:

    “The discovery of truth is the great business of the philosopher.”