During our spiritual Journey we accumulate a vast amount of knowledge of the world. From the books read, lectures heard and conversations had, we try to pick the useful and interesting bits of information, ideas, thoughts and theories. The same applies to experience.
We believe that if we gather a sufficient amount of information during our spiritual journey, we achieve something, we improve, we make progress.
All the knowledge and experience collected, however, improves the contents of the mind, that is, a part of the spiritual Ego.