“Speak of the Gods as they are.”
The Lives and Opinions of Eminent Philosophers (c. 230)
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Bias of Priene 12
ancient Greek philosopher, one of the Seven Sages -600–-530 BCRelated quotes

“In the silence of the heart, God speaks.”
If you face God in prayer and silence, God will speak to you. Then you will know that you are nothing.
In The Heart Of The World
Source: Knoansw, In The Heart Of The World – Amazing Book Of Mother Teresa, September 03, 2020 https://knoansw.com/in-the-heart-of-the-world-mother-teresa-quotes/

“Before you speak, it is necessary for you to listen, for God speaks in the silence of the heart. ”

“Silence is the only language god speaks.”
Source: Dime-Store Alchemy

“I’ll never speak to God again.”
“You should not dare to speak of God to the multitude.”
Sentences of Sextus

Attributed to Bonhoeffer on the Internet, and supposedly from Bonhoeffer: Pastor, Martyr, Prophet, Spy http://books.google.com/books?id=aG0q3X8TVpsC&pg=PA486#v=onepage (2010) by Eric Metaxas; however, there is no actual reference in that book. However, in advertising the book Metaxas does state on his site that the quote is from Bonhoeffer. http://ericmetaxas.com/books/bonhoeffer-pastor-martyr-prophet-spy/ First attributed to Bonhoeffer in Explorations 12:1 (1998), p. 3, as referenced by James Cone (2004) Theology's Great Sin: Silence in the Face of White Supremacy, Black Theology, 2:2, 139-152, footnote 1 http://dx.doi.org/10.1558/blth.2.2.139.36027
Compare "Not to Act, is to Act!" by Francis W. McPeek http://www.ergo-sum.net/pics/McPeek.jpg, The Missionary Herald at Home and Abroad, v.141-142 (1945-1946), "Missionary herald, 1945 - Congregational churches," pp.34-35 (We must realize that church inaction is a form of political action, and it is altogether negative. “Not to act, is to act.”)
Misattributed

“Live among men as if God beheld you; speak with God as if men were listening.”
sic vive cum hominibus tamquam deus videat, si loquere cum deo tamquam homines audiant.
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter X: On living to oneself, Line 5.

“The mystic too full of God to speak intelligibly to the world.”
Arthur Rimbaud.
The Symbolist Movement in Literature (1899)