Harold Monro . And God ! High -throned He dwells in farthest sky, Into whose presence none shall ever pass , Save by the flesh of Jesus Christ, which I Reveal to all believers in the Mass . Ah , when His Holy Spirit amid fumes Of incense lifts me out of self - control , No heretic can dream how He illumes The innermost recesses of my soul . That is a mystery I alone may scan , Privileged in my character of priest ; So now in my capacity of man , I ask you all to come with me and Caustic . - feast . Innocent . Sir, who are you ? Caustic . A man of good intent : A leech - a bodily salvation - giver . That sense mysterious of the sacrament Exists not in your soul , but in your liver . God is a fiction of the nervous cells Connected with a portion of the brain . Religion is disease , and it expels Spontaneous thought and renders manhood vain . How , at the last , you always , in your need , Summon the leech to save you , makes me smile . I diagnose a man 's religious creed By testing the condition of his bile . [ Joseph arrives . God , in the end , and heaven and earth will sink Back to eternal Chaos whence they came . Both He and you are tottering on the brink Of epilepsy , 142