Who is Jesus as a Fellow Sufferer from The Interior Castle and what is their importance?

Later in the book, Teresa talks about the trials of continuing to live on earth, separated from the Beloved of their souls, and encourages them by reminding them they are sharing in the suffering of Jesus, who lived separated from His Father and His home. He did this in order to live as humble a life as could be lived, completely in service of other people, and then to be rejected and killed by souls He created and loved enough to die for. She suggests that any suffering a soul does on earth only serves to bring her closer to Him, and so is to be cherished.