The Brahman cannot be described by knowledge about material objects. There is infinite happiness in getting to know the Brahman. A person, who knows the Brahman, is freed from all fear.
Such a learned person does not waste time in thinking why he performed evil acts and not good ones. Such a learned person knows the Brahman who is beyond evil acts and good ones. Such a learned person sees the Brahman in both evil acts and good ones. That is the secret of brahmavidya.