Martin was ruthless in destroying artwork that she considered immature, which for her included anything made prior to the late 1950s.
—Nancy Princenthal on the book Agnes Martin: Her Life and Art
Martin's attitude toward her early work is problematic. She destroyed most of it, and one feels that she would gladly make a bonfire of the rest if she could get her hands on it.
- Benita Eisler on The New Yorker