 Ancient historians give as a reason for Tiberius' retirement to Capri his inability to endure his mother any longer.Until AD 22 there had, according to Tacitus, been "a genuine harmony between mother and son, or a hatred well concealed;" Dio tells us that at the time of his accession already Tiberius heartily loathed her.In AD 22 she had fallen ill, and Tiberius had hastened back to Rome in order to be with her.