It is like the thirsty traveller who at first sincerely sought the water of knowledge, but who later, having found it plain perhaps, proceeded to temper his cup with the salt of doubt so that his thirst now becomes insatiable though he drinks incessantly, and that in thus drinking the water that cannot slake his thirst, he has forgotten the original and true purpose for which the water was sought.
Syed Muhammad Naquib al-Attas, Islam: The Concept of Religion and The Foundation of Ethics and Morality
knowledge