Custom, tradition, and intellectual laziness lead men to follow their religious leaders blindly. Religions have been the sole cause of the bloody wars that have ravaged mankind. Religions have also been resolutely hostile to philosophical speculation and to scientific research. The so-called holy scriptures are worthless and have done more harm than good, whereas the writings of the ancients like Plato, Aristotle, Euclid, and Hippocrates have rendered much greater service to humanity.
Abū Bakr Muhammad ibn Zakariyā al-Razi