Browning allows his virtuous intellectuals, Caponsacchi and the Pope, just so much volitional power before he suggests its limits. Caponsacchi's tasking of his whole mind to touch and clasp the ‘serious thing’, and the Pope's ‘hard labour and good will, / And habitude’ still do not fully equip them for the ‘initiatory pang’ or ‘quite new quick cold thrill’ which upsets the verse as it courses through their thought and speech. Tennyson's speakers, in thrall to mood as they and their poet are, have even rarer moments of decisiveness. By temperament, chance or error they often find themselves suffering from the great interruption into their intellectual and emotional lives of the moment of unwilled powerlessness such as Lucretius marks in his monologue. ‘Meant? I meant?’ he suddenly asks himself, picking up the word he has used four lines previously, before speaking in a present tense which knows only of his new-found forgetfulness, and the disabling of his stumbling mind and lame faculties.