“I replace melancholy by courage, doubt by certainty, despair by hope, malice by good, complaints by duty, scepticism by faith, sophisms by cool equanimity and pride by modesty.”

Dry Sticks, Different Graces (1858).

On the advisableness of improving natural knowledge (1866) http://www.gutenberg.org/dirs/etext01/thx1410.txt
1860s
Context: The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, scepticism is the highest of duties; blind faith the one unpardonable sin. And it cannot be otherwise, for every great advance in natural knowledge has involved the absolute rejection of authority, the cherishing of the keenest scepticism, the annihilation of the spirit of blind faith; and the most ardent votary of science holds his firmest convictions, not because the men he most venerates hold them; not because their verity is testified by portents and wonders; but because his experience teaches him that whenever he chooses to bring these convictions into contact with their primary source, Nature — whenever he thinks fit to test them by appealing to experiment and to observation — Nature will confirm them. The man of science has learned to believe in justification, not by faith, but by verification.

Sylvanus Thayer Award acceptance speech to the cadets of the U.S. Military Academy at West Point, New York (12 May 1962)

The Divine Commodity: Discovering A Faith Beyond Consumer Christianity (2009, Zondervan)

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.]

The Eighth Day (1967)

Source: The Picture of Dorian Gray

Source: Fell