“That the equality of human souls in the sight of God ought to be translated into a political structure of equal political rights has come to be regarded as the most authentic interpretation of the Gospel itself. Slavery, and the imposition of all arbitrary forms of inequality of man by man, has come to be seen as demeaning to the souls of God's creation.”

Conquest of Violence: The Gandhian Philosophy of Conflict, by Joan V. Bondurant (1965) University of California Press, Berkeley: CA, pp. 168-169
Posthumous publications (1950s and later)

1990s, The End of History Means the End of Freedom (1990)

Section 1, “Politics, Economics, and the Nation” Introduction (pp. 7-8)
A Mathematician Reads the Newspaper (1995)

NOW interview (2002)
Context: Ironically, the first thing that appealed to me about Islam was its pluralism. The fact that the Qur'an praises all the great prophets of the past. That Mohammed didn't believe he had come to found a new religion to which everybody had to convert, but he was just the prophet sent to the Arabs, who hadn't had a prophet before, and left out of the divine plan. There's a story where Mohammed makes a sacred flight from Mecca to Jerusalem, to the Temple Mount. And there he is greeted by all the great prophets of the past. And he ascends to the divine throne, speaking to the prophets like Jesus and Aaron, Moses, he takes advice from Moses, and finally encounters Abraham at the threshold of the divine sphere. This story of the flight of Mohammed and the ascent to the divine throne is the paradigm, the archetype of Muslim spirituality. It reflects the ascent that every Muslim must make to God and the Sufis... the mystical branch of Islam, the Sufi movement, insisted that when you had encountered God, you were neither a Jew, a Christian, a Muslim. You were at home equally in a synagogue, a mosque, a temple or a church, because all rightly guided religion comes from God, and a man of God, once he's glimpsed the divine, has left these man-made distinctions behind.

1920s, Duty of Government (1920)

Sermon 9, as translated in The Reading and Preaching of the Scriptures in the Worship of the Christian Church (1999) by Hughes Oliphant Old, Ch. 9: The German Mystics, p. 449

Inscription on monument

Source: Think Big (1996), p. 56

In Kevin W. Kelley The Home Planet, with Plate 38; as quoted by C.C. Gaither & Alma E Cavazos-Gaither (2003). Astronomically Speaking: A Dictionary of Quotations on Astronomy and Physics. p. 262. CRC Press. ISBN: 9781420034677
Context: The Earth reminded us of a Christmas tree ornament hanging in the blackness of space. As we got farther and farther away it diminished in size. Finally it shrank to the size of a marble, the most beautiful marble you can imagine. That beautiful, warm, living object looked so fragile, so delicate, that if you touched it with a finger it would crumble and fall apart. Seeing this has to change a man, has to make a man appreciate the creation of God and the love of God.