A fool who recognises his own ignorance is thereby in fact a wise man, but a fool who considers himself wise - that is what one really calls a fool.
The darkest night is ignorance.
The cause of all pain and suffering is ignorance.
Wisdom makes light the darkness of ignorance.
Seeing the Way is like going into a dark room with a torch; the darkness instantly departs, while the light alone remains. When the Way is attained and the truth is seen, ignorance vanishes and enlightenment abides forever.
It is ignorance that smothers, and it is carelessness that makes it invisible. The hunger of craving pollutes the world, and the pain of suffering causes the greatest fear.