“Blood will stream over Europe until the nations become aware of the frightful madness which drives them in circles. And then, struck by celestial music and made gentle, they approach their former altars all together, hear about the works of peace, and hold a great celebration of peace with fervent tears before the smoking altars.”

Source: Knots Untied (1877), Ch. XVII: "The Fallibility of Ministers", p. 373

Address before the Indian Council of World Affairs, New Delhi, India, April 5, 1956, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 141
1950s, Address before the Indian Council on World Affairs (1956)

Written in his Journal, Dec 1796, and one of O'Connell's most well-known quotes. Quoted by O'Ferrall, F., Daniel O'Connell, Dublin, 1981, p. 12

"Trefusis Blasphemes" radio broadcast, as published in Paperweight (1993)
1990s
Context: I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance. That is my religion, and every day I am sorely, grossly, heinously and deeply offended, wounded, mortified and injured by a thousand different blasphemies against it. When the fundamental canons of truth, honesty, compassion and decency are hourly assaulted by fatuous bishops, pompous, illiberal and ignorant priests, politicians and prelates, sanctimonious censors, self-appointed moralists and busy-bodies, what recourse of ancient laws have I? None whatever. Nor would I ask for any. For unlike these blistering imbeciles my belief in my religion is strong and I know that lies will always fail and indecency and intolerance will always perish.

De Pace Fidei (The Peace of Faith) (1453)

Life: Relish It!
Life: Relish It! (2012)

Living in Harmony (2000)

Epithalamion, line 223; reported in Bartlett's Familiar Quotations, 10th ed. (1919)

The Sacred Pipe (1953)