If there is a character in this story who stands head and shoulders above the rest it has got to be the lawyer, Utterson; and the first paragraph is worth keeping in mind as the reader proceeds. Also, the habit of meeting with good friends over good wine (Jekyll, Utterson and Lanyon) should be noted and mentally stored away. Good company, so long as it is good, facilitates a moderating effect upon the personality. Maintaining such company is conducive to both mental discipline and balance. Jekyll's gradual withdrawal from his friends accelerates his downfall (not that it wouldn't have eventually happened anyway, given the strength of his alter ego). But one can't help thinking that if Utterson had been allowed in things would have been different. Lanyon is good, admittedly, but weak. Poole, because of his class, is out of the running when it comes to influencing Jekyll. But not so Utterson. In Utterson we have `a man ... that was never lighted by a smile; cold scanty and embarrassed in discourse; backward in sentiment; lean, dusty, dreary and yet somehow lovable' . Brilliant!
Dr Jekyll's statement of the case (last chapter) expounds, in his own words, the `struggle of the good soul' and its subsequent defeat and overthrow by Edward Hyde. Stevenson cleverly uses this technique to effectively convey the agony and anguish associated with the doctor's self-imposed hell. A great read!