Vedanta sar is probably the best known praker an introductory text, a traditional veranta. Students are introduced to vedanta adeta through vedanta sara be completed. Each of those texts, verantesara, viveturavani, drigdrisevivi, a poctonabute, automobile all tell you the same thing. Hem why? Because i told you, there are these simple but almost insurmountable obstacles. This realizing being enlightened is a kind of knowledge, but it's not knowledge as we know it. Another big obstacle.
As part of retreat inspired by the Ashtavakra Gita, Swami Sarvapriyananda speaks on the connection between the path of knowledge and devotion.