“If forgers and malefactors are put to death by the secular power, there is much more reason for excommunicating and even putting to death one convicted of heresy.”
Summa Theologica (1265–1274), Unplaced by chapter
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Thomas Aquinas 104
Italian Dominican scholastic philosopher of the Roman Catho… 1225–1274Related quotes

“Persons convicted of the forcible violation of any female prisoner shall be put to death.”
Article XLI.
Provisional Constitution and Ordinances (1858)

“One should hasten to put such witches to death.”
Statement of 20 August 1538; as quoted in Conversations With Martin Luther (1915), translated and edited by Preserved Smith and Herbert Percival Gallinger, p. 163

Sefer Hamitzvot [Book of the Commandments], commentary on Negative Commandment 290, as translated by Charles B. Chavel (1967); also in Defending the Human Spirit : Jewish Law's Vision for a Moral Society (2006) by Warren Goldstein, p. 269

“See, they say, how they love one another, for themselves are animated by mutual hatred; how they are ready even to die for one another, for they themselves will sooner put to death.”
Vide, inquiunt, ut invicem se diligant; ipsi enim invicem oderunt: et ut pro alterutro mori sint parati; ipsi enim ad occidendum alterutrum paratiores erunt.
Source: Apologeticus pro Christianis, Chapter 39, describing how Christianity is mocked by its enemies.

“Heresy is the life of a mythology, and orthodoxy is the death.”
Lecture 1A, 20:42
Mythology and the Individual (1997)

The First Part, Chapter 11, p. 47.
Leviathan (1651)
Context: So that in the first place, I put for a general inclination of all mankind a perpetual and restless desire of Power after power, that ceaseth only in Death. And the cause of this is not always that a man hopes for a more intensive delight than he has already attained to, or that he cannot be content with a moderate power: but because he cannot assure the power and means to live well, which he hath present, without the acquisition of more.