Complex sentence: Accordingly, Krishnamurti advised against following any doctrine, discipline, teacher, guru, or authority including himself, as well as one's own past psychological knowledge or experience, which he considered part of the "observer".
Split into simpler sentences: Accordingly, Krishnamurti advised against following any doctrine, discipline, teacher, guru, or authority, including himself. He also advised against following one's own past psychological knowledge and experience, which he considered integral parts of the "observer".