Oh external worshiper, know that worship without heart is motions. Oh seeker of knowledge, know that knowledge without purification is a dangerous weapon of the ego. Oh activist, know that work without orientation of heart is fruitless. Oh lover, know that love without God is pain. - Yasmin Mogahed
There are two atheisms of which one is a purification of the notion of God. - Simone Weil
Training was a rite of purification; from it came speed, strength. Racing was a rite of death; from it came knowledge - John L. Parker Jr.
As long as one sees faults with the world, he prevails in the knowledge of the senses. The inner purification has not yet occurred in him. - Dada Bhagwan