“Poetry is written with tears, fiction with blood, and history with invisible ink.”
Source: The Angel's Game
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Carlos Ruiz Zafón 149
Spanish writer 1964
Related quotes

“The very ink with which all history is written is merely fluid prejudice.”
Source: Pudd'nhead Wilson and Other Tales

Section J of 26 Facts About Flesh and Ink
The Pillow Book

As quoted in Al-Jaami' al-Saghîr by Imam al-Suyuti, where it is declared a "weak Hadith".
Variant translations:
The ink of the scholar is holier than the blood of the martyr.
The Islamic Review, Vol. 22 (1934), p. 105, edited by Khwajah Kamal al-Din
The ink of scholars will be weighed in the scale with the blood of martyrs.
As quoted in Knowledge of God in Classical Sufism: Foundations of Islamic Mystical Theology (2004) by John Renard
Sunni Hadith

“The purpose of literature is to turn blood into ink.”
“Social Invisibility is Not a Fiction, it Exists.”
Source: Sunday Observer (Sri Lanka) http://www.sundayobserver.lk/2019/06/02/youth-observer/social-invisibility-not-fiction-it-exists
Source: Ceylon Today https://ceylontoday.lk/features-more/2828
Source: The Morning http://epaper.themorning.lk/Home/ShareArticle?OrgId=d4ac636c&imageview=0
Source: Scribd https://www.scribd.com/book/425667242/Social-Invisibility-is-not-a-fiction-it-exists
Source: Ceylon Today https://ceylontoday.lk/features-more/4150
Source: Amazon Kindle https://www.amazon.com/s?i=stripbooks&rh=p_27%3AMichelle+Dilhara&s=relevancerank&text=Michelle+Dilhara&ref=dp_byline_sr_book_1

Speech to the Reichstag (28 May 1915), quoted in W. W. Coole (ed.), Thus Spake Germany (1941), p. 222