text: No, we must work. To tell the truth, even the work is not great, if only, as I said, we begin to mould and reconstruct our souls before they are hardened by sin. But I do not despair even of a hardened sinner. There is nothing that will not surrender to persistent treatment, to concentrated and careful attention; however much the timber may be bent, you can make it straight again. Heat unbends curved beams, and wood that grew naturally in another shape is fashioned artificially according to our needs. How much more easily does the soul permit itself to be shaped, pliable as it is and more yielding than any liquid! For what else is the soul than air in a certain state? And you see that air is more adaptable than any other matter, in proportion as it is rarer than any other.