“Where there is discord, may we bring harmony. Where there is error, may we bring truth. Where there is doubt, may we bring faith. And where there is despair, may we bring hope.”
Statement on the doorstep of 10 Downing Street, after her election as Prime Minister, as quoted at On this day (BBC) http://news.bbc.co.uk/onthisday/hi/dates/stories/may/4/newsid_2503000/2503195.stm. (This is a paraphrasing of a prayer commonly misattributed to St. Francis of Assisi.)
First term as Prime Minister
Source: [Who wrote Prayer of St. Francis? Doubtful it was friar, San Diego Union-Tribune, 27 January 2009, 28 July 2019, https://www.sandiegouniontribune.com/sdut-1n27prayer00320-who-wrote-prayer-st-francis-doubtf-2009jan27-htmlstory.html, Lord, make me an instrument of thy peace. Where there is hatred, let me sow love; Where there is injury, pardon; Where there is doubt, faith; Where there is despair, hope; Where there is darkness, light; Where there is sadness, joy.]
Source: [The real prayer of Francis of Assisi, Howse, Christopher, The Daily Telegraph, 12 April 2013, 28 July 2019, https://www.telegraph.co.uk/news/religion/9991301/The-real-prayer-of-Francis-of-Assisi.html, That was written in 1912, in French, and published in a pious magazine edited by Fr Esther Bouquerel. It was attributed to St Francis in 1927 through its having been printed on the back of a picture of the saint.]
Source: [Who wrote Prayer of St. Francis? Doubtful it was friar, San Diego Union-Tribune, 27 January 2009, 28 July 2019, https://www.sandiegouniontribune.com/sdut-1n27prayer00320-who-wrote-prayer-st-francis-doubtf-2009jan27-htmlstory.html, An article published last week in L'Osservatore Romano, the Vatican newspaper, said the prayer in its current form dates only from 1912, when it appeared in a French Catholic periodical. ... Although news to many, the truth about the prayer had apparently been hiding in plain sight. “No one among the Franciscans ever thought it really was by St. Francis,” said Giovanni Maria Vian, the editor of L'Osservatore Romano.]
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Margaret Thatcher 348
British stateswoman and politician 1925–2013Related quotes

Widely known as The Prayer of St. Francis, it is not found in Esser's authoritative collection of Francis's writings.
[Fr. Kajetan, Esser, OFM, ed., Opuscula Sancti Patris Francisci Assisiensis, Rome, Grottaferrata, 1978]. Additionally there is no record of this prayer before the twentieth century.
[Fr. Regis J., Armstrong, OFM, Francis and Clare: The Complete Works, New York, Paulist Press, 1982, 10, 0-8091-2446-7]. Dr. Christian Renoux of the University of Orleans in France traces the origin of the prayer to an anonymous 1912 contributor to La Clochette, a publication of the Holy Mass League in Paris. It was not until 1927 that it was attributed to St. Francis.
The Origin of the Peace Prayer of St. Francis, 2013-06-28, Renoux, Christian http://www.franciscan-archive.org/franciscana/peace.html,.
[Christian, Renoux, La prière pour la paix attribuée à saint François: une énigme à résoudre, Paris, Editions franciscaines, 2001, 2-85020-096-4].
Misattributed

Source: The Image: A Guide to Pseudo-Events in America (1961), p. 261.

Source: Wherever You Go, There You Are: Mindfulness Meditation in Everyday Life

106
Fruits of Solitude (1682), Part I

Can it alter the cause, or unravel the mystery of human events?
Misattributed to Tryon Edwards by a number of websites, thinkexist.com and quoteland.com among others. This quote does appear on p. 23 of Edwards' compilation, A Dictionary of Thoughts; however, it is clearly identified there as a quote by Hugh Blair, the Scottish author and preacher.
A genuine Tryon Edwards quote on the subject of anxiety appears above in the Sourced section ( from p. 22 of A Dictionary of Thoughts. )
Misattributed

Can it alter the cause, or unravel the mystery of human events?
Quoted in A Dictionary of Thoughts: Being a Cyclopedia of Laconic Quotations from the Best Authors of the World, Both Ancient and Modern, https://books.google.com/books?id=zlMxAAAAIAAJ ed. Tryon Edwards, F. B. Dickerson Company (1908), p. 23.

Part i, canto ii.
Lucile (1860)