Whosoever studies works of science must, if he wants to find the truth, transform himself into a critic of everything he reads.
In plain words
Don't just believe what you read. Question it like a detective.
Where these words come from
- 50% sureLots of sources credit Ibn al-Haytham with this, and they agree with each other. The book or the speech it first came from hasn't turned up yet.
- Translated line attributed to Ibn al-Haytham's critical-method writings, cited via Ehsan Masood, Science and Islam, p. 169 (a modern secondary academic source relaying the translation, not a primary text fetch).
