"Avicenna an article by Seyyed Hossein Nasr on Encyclopedia Britannica Online"

“Medicine considers the human body as to the means by which it is cured and by which it is driven away from health.”

“Ibn Sina from the Encyclopedia of Islam”

“Catholic Encyclopedia: Avicenna”

“Avicenna/Ibn Sina at the Internet Encyclopedia of Philosophy”

“Those who deny the first principle should be flogged or burned until they admit that it is not the same thing to be burned and not burned, or whipped and not whipped.”

“God, the supreme being, is neither circumscribed by space, nor touched by time; he cannot be found in a particular direction, and his essence cannot change. The secret conversation is thus entirely spiritual; it is a direct encounter between God and the soul, abstracted from all material constraints.”