The following is an extract from Frankenstein. What does the "habits" in "returned to my old habits" mean? It does not seem to refer to habits like drinking, staying up late, etc. If it refers to something else, how would you express the idea in current English?
Who shall conceive the horrors of my secret toil, as I dabbled among the unhallowed damps of the grave, or tortured the living animal to animate the lifeless clay? My limbs now tremble, and my eyes swim with the remembrance; but then a resistless, and almost frantic, impulse, urged me forward; I seemed to have lost all soul or sensation but for this one pursuit. It was indeed but a passing trance, that only made me feel with renewed acuteness so soon as, the unnatural stimulus ceasing to operate, I had returned to my old habits.