For those who paint the undersides of boats, makers of ornamental drains on roofs too high to be seen; for cobblers who labor over inner soles; for seamstresses who stitch the wrong sides of linings; for scholars whose research leads to no obvious discovery; for dentists who polish each gold surface of the fillings of upper molars; for sewer engineers and those who repair water mains; for electricians; for artists who suppress what does injustice to their visions; for surgeons whose sutures a