I don't think Shelby expects anyone to believe her words just because she says that they are from Jesus. In fact, she has repeatedly said that each of us should go to Jesus directly, (if we choose) and to pray to hear for ourselves. She is simply sharing the understanding that she has, in kind spirit.
Her posts make me think, and often push me to understand more - whether I am currently in agreement with her thoughts or not.
As for the hearing and listening thing: agreeing and listening is supposed to equate to the same thing as seeing and hearing. This is what Jesus referred to when he spoke about, 'He who has ears to hear, let him hear..." (Mark 4:9) Obviously those listening to him had physically heard him speak - but they had not necessarily understood or agreed with what He spoke. Also " so that, 'they may be ever seeing but never perceiving, and ever hearing but never understanding..." Mark 4:12
Tammy