WikiQuote has a Manson page. A few that either made me laugh or otherwise caught my attention:
You know, a long time ago being crazy meant something. Nowadays everybody's crazy.
- Interview by Diane Sawyer (1994)
As long as there's hate in your heart, there'll be hate in the world. You can't fight for peace and you cannot capture freedom.
- Interview track from Charles Manson Sings (2006)
Death is psychosomatic
- NBC interview (1987)