XII

The next point to these will be to take care that we do not labour for what is vain, or labour in vain: that is to say, neither to desire what we are not able to obtain, nor yet, having obtained our desire too late, and after much toil to discover the folly of our wishes: in other words, that our labour may not be without result, and that the result may not be unworthy of our labour: for as a rule sadness arises from one of these two things, either from want of success or from being ashamed of having succeeded. We must limit the running to and fro which most men practise, rambling about houses, theatres, and marketplaces. They mind other men’s business, and always seem as though they themselves had something to do. If you ask one of them as he comes out of his own door, “Whither are you going?” he will answer, “By Hercules, I do not know: but I shall see some people and do something.” They wander purposelessly seeking for something to do, and do, not what they have made up their minds to do, but what has casually fallen in their way. They move uselessly and without any plan, just like ants crawling over bushes, which creep up to the top and then down to the bottom again without gaining anything.