mental labor, n.All

Mental labor (n.) and ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠physical labour belong together as head and hand do in nature; later they separate, and the separation grows into hostile antagonism.

Mental labor (n.) leaves ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the active men devoted solely to it ready to be seized with zeal by the smallest practical task — like prying loose a balustrade that was never loose.