“It's very important for Christians to be thinking Christians, not just partisan Christians.”

Source: The Culture of Make Believe (2003), p. 57

Source: Letter to a Christian Nation

"The Fish Gate" sermon (September 2, 2007)

Ich denke, also bin ich kein Christ.
Bissige Aphorismen, S. 35

Tusnádfürdő speech http://www.kormany.hu/en/the-prime-minister/the-prime-minister-s-speeches/prime-minister-viktor-orban-s-speech-at-the-29th-balvanyos-summer-open-university-and-student-camp, 28 July 2018

Source: We Are Doomed: Reclaiming Conservative Pessimism (2009)

Source: The Laundry Files, The Apocalypse Codex (2012), Chapter 12, “With a Bible and a Gun” (p. 240)

Last letter to Father Joseph-Marie Perrin, from a refugee camp in Casablanca (26 May 1942), as translated in The Simone Weil Reader (1957) edited by George A. Panichas, p. 111
Context: Wrongly or rightly you think that I have a right to the name of Christian. I assure you that when in speaking of my childhood and youth I use the words vocation, obedience, spirit of poverty, purity, acceptance, love of one's neighbor, and other expressions of the same kind, I am giving them the exact signification they have for me now. Yet I was brought up by my parents and my brother in a complete agnosticism, and I never made the slightest effort to depart from it; I never had the slightest desire to do so, quite rightly, I think. In spite of that, ever since my birth, so to speak, not one of my faults, not one of my imperfections really had the excuse of ignorance. I shall have to answer for everything on that day when the Lamb shall come in anger.
You can take my word for it too that Greece, Egypt, ancient India, and ancient China, the beauty of the world, the pure and authentic reflections of this beauty in art and science, what I have seen of the inner recesses of human hearts where religious belief is unknown, all these things have done as much as the visibly Christian ones to deliver me into Christ's hands as his captive. I think I might even say more. The love of these things that are outside visible Christianity keeps me outside the Church... But it also seems to me that when one speaks to you of unbelievers who are in affliction and accept their affliction as a part of the order of the world, it does not impress you in the same way as if it were a question of Christians and of submission to the will of God. Yet it is the same thing.

"The Character of a Methodist" (1739); in The Works of the Rev. John Wesley in Ten Volumes (1826), Volume IV, p. 407; A portion of this is commonly quoted as "Think and let think.".
General sources
Context: The distinguishing marks of a Methodist are not his opinions of any sort. His assenting to this or that scheme of Religion, his embracing any particular set of notions, his espousing the judgment of one man or of another, are all quite wide of the point. Whosoever therefore imagines, that a Methodist is a man of such or such an opinion, is grossly ignorant of the whole affair; he mistakes the truth totally. We believe indeed, that all Scripture is given by the inspiration of God, and herein we are distinguished from Jews, Turks, and Infidels. We believe the written word of God to be the only and sufficient rule, both of Christian faith and practice; and herein we are fundamentally distinguished from those of the Romish church. We believe Christ to be the eternal, supreme God; and herein we are distinguished from the Socinians and Arians. But as to all opinions which do not strike at the root of Christianity, we think and let think. So that whatsoever they are, whether right or wrong, they are no distinguishing marks of a; Methodist.