“We know the truth, not only by the reason, but by the heart.”

Never Born, Never Died (2002)
Context: Tao mystics never talk about God, reincarnation, heaven, hell. No, they don't talk about these things. These are all creations of human mind: explanations for something which can never be explained, explanations for the mystery. In fact, all explanations are against God because explanation de-mystifies existence. Existence is a mystery, and one should accept it as a mystery and not pretend to have any explanation. No, explanation is not needed — only exclamation, a wondering heart, awakened, surprised, feeling the mystery of life each moment. Then, and only then, you know what truth is. And truth liberates.

Variant: The heart has its reasons which reason knows not.
Source: The Mind on Fire: A Faith for the Skeptical and Indifferent

Encyclical Fides et Ratio, 14 September 1998
Source: www.vatican.va http://www.vatican.va/holy_father/john_paul_ii/encyclicals/documents/hf_jp-ii_enc_14091998_fides-et-ratio_en.html

Quote in 'Culture: Caspar D. Friedrich and the Wasteland', by Gjermund E. Jansen in Bits of News (3 March 2005) http://www.bitsofnews.com/content/view/154/42/
Variant translation: The heart is the only true source of art, the language of a pure, child-like soul. Any creation not sprung from this origin can only be artifice. Every true work of art is conceived in a hallowed hour and born in a happy one, from an impulse in the artist's heart, often without his knowledge. (as quoted in the article 'Caspar David Friedrich's Medieval Burials', Karl Whittington - http://www.19thc-artworldwide.org/spring12/whittington-on-caspar-david-friedrichs-medieval-burials)
undated
Context: The pure, frank sentiments we hold in our hearts are the only truthful sources of art. A painting which does not take its inspiration from the heart is nothing more than futile juggling. All authentic art is conceived at a sacred moment and nourished in a blessed hour; an inner impulse creates it, often without the artist being aware of it.

Strange Horizons interview (2008)
Context: The Inquisition, by defining and limiting knowledge, was evil. The Taliban, by defining truth and refusing girls an education, is evil. Any religion that says it knows the one and only truth is evil, because it limits knowledge. Any political body that says it owns the truth is evil. Same reason.
Any repressive regime that seeks to control exploration and experimentation is evil. Same reason. Any regime that defines truth as a set of beliefs and occurrences that cannot be questioned, that can neither be demonstrated nor proven is not only evil but ridiculous. This includes all mythologies, miracles, etc. because, if creation happened for a reason, if it was done by God, you'd better believe every part of it, including intelligence, was done for a reason ascertainable, eventually, by intelligence. We would not follow and adore a ruler who lied and tortured. Why would we worship a God who did either? God doesn't lie and he/she/it doesn't fool around!
Shutting down inquiry is evil. Causing pain purposefully for no reason is evil. Enjoying causing pain by shutting down inquiry is an absolute evil.

Source: Family Matters

Cartoon caption, The New Yorker (27 July 1935)
Borrowing from Blaise Pascal, Pensées, 1670 (published posthumously): ""Le coeur a ses raisons que la raison ne connaît point""
Cartoon captions