Useful Work versus Useless Toil

"Here, you see, are two kinds of work--one good, the other bad; one not far removed from a blessing, a lightening of life; the other a mere curse, a burden to life. What is the difference between them, then? This: one has hope in it, the other has not. It is manly to do the one kind of work, and manly also to refuse to do the other. What is the nature of the hope which, when it is present in work, makes it worth doing? ..."