“The fact is that those who are enslaved to their sects are not merely devoid of all sound knowledge, but they will not even stop to learn!”
Galen, On the Natural Faculties, Bk. 1, sect. 13; cited from Arthur John Brock (trans.) On the Natural Faculties (London: Heinemann, 1963) p. 57.
Help us to complete the source, original and additional information
Galén 11
Roman physician, surgeon and philosopher 129–216Related quotes
Source: The Principles of State and Government in Islam (1961), Chapter 5: The Citizens And The Government, p 86
Source: Everyone is African: How Science Explodes the Myth of Race (2015), p. 152.

Source: The Principles of Science: A Treatise on Logic and Scientific Method (1874) Vol. 1, p. 14

“Never stop learning. The thirst to gain more knowledge should never come to an end.”
How I made it: CNR Rao, Scientist (2010)

“Learn knowledge and science from him who teaches it, even if he doesn't practice what he preaches.”
Ibn Shu’ba al-Harrani, Tuhaf al-'Uqul, p. 299

Introduction
Popular Astronomy: A Series of Lectures Delivered at Ipswich (1868)