...inconstant, exceedingly variable in its intensity and energy, sensibility often passes, with astonishing rapidity, from the lowest degree of prostration to the highest point of exaltation. It is a free, an independent faculty, as incalculable in its effects, as unknown in its cause. Alternately...

...variable beyond measure, in its intensity and its energy, the sensibility often passes with astonishing rapidity from the lowest degree of prostration to the highest point of exaltation. It is a free faculty — independent — is a spontaneous force, as incalculable in results as it is...