“I have no doubt that in heaven the angels will regard the blessed as a necessary evil.”

Veto Mesage Regarding the Bank of the United States http://avalon.law.yale.edu/19th_century/ajveto01.asp (10 July 1832).
1830s
Context: It is to be regretted that the rich and powerful too often bend the acts of government to their selfish purposes. Distinctions in society will always exist under every just government. Equality of talents, of education, or of wealth can not be produced by human institutions. In the full enjoyment of the gifts of Heaven and the fruits of superior industry, economy, and virtue, every man is equally entitled to protection by law; but when the laws undertake to add to these natural and just advantages artificial distinctions, to grant titles, gratuities, and exclusive privileges, to make the rich richer and the potent more powerful, the humble members of society — the farmers, mechanics, and laborers — who have neither the time nor the means of securing like favors to themselves, have a right to complain of the injustice of their government. There are no necessary evils in government. Its evils exist only in its abuses. If it would confine itself to equal protection, and, as Heaven does its rains, shower its favors alike on the high and the low, the rich and the poor, it would be an unqualified blessing.

Song Bless You For Being An Angel

1840s, Letters from New York (1843)
Source: Letters from New York http://www.bartleby.com/66/61/12261.html, vol. 1, letter 34

Source: The Revolt of the Angels (1914), Ch. XXXV
Context: Satan, piercing space with his keen glance, contemplated the little globe of earth and water where of old he had planted the vine and formed the first tragic chorus. And he fixed his gaze on that Rome where the fallen God had founded his empire on fraud and lie. Nevertheless, at that moment a saint ruled over the Church. Satan saw him praying and weeping. And he said to him:
"To thee I entrust my Spouse. Watch over her faithfully. In thee I confirm the right and power to decide matters of doctrine, to regulate the use of the sacraments, to make laws and to uphold purity of morals. And the faithful shall be under obligation to conform thereto. My Church is eternal, and the gates of hell shall not prevail against it. Thou art infallible. Nothing is changed."
And the successor of the apostles felt flooded with rapture. He prostrated himself, and with his forehead touching the floor, replied:
"O Lord, my God, I recognise Thy voice! Thy breath has been wafted like balm to my heart. Blessed be Thy name. Thy will be done on Earth, as it is in Heaven. Lead us not into temptation, but deliver us from evil."

1770s, Common Sense (1776)
Context: Society in every state is a blessing, but government even in its best state is but a necessary evil; in its worst state an intolerable one; for when we suffer, or are exposed to the same miseries BY A GOVERNMENT, which we might expect in a country WITHOUT GOVERNMENT, our calamity is heightened by reflecting that we furnish the means by which we suffer.

Source: The Prime Minister (1876), Ch. 7

Churchill By Himself: The Definitive Collections of Quotations, ed. Richard Langworth, 2008, p. 424, (1907, 12 February)
Early career years (1898–1929)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 304.

Source: Losing My Virginity: How I've Survived, Had Fun, and Made a Fortune Doing Business My Way