“Opinion is steadily inclining towards making the division of labor an imperative rule of conduct, to present it as a duty. Those who shun it are not punished precise penalty fixed by law, it is true; but they are blamed. The time has passed when the perfect man was he who appeared interested in everything without attaching himself exclusively to anything, capable of tasting and understanding everything finding means to unite and condense in himself all that was most exquisite in civilization. … We want activity, instead of spreading itself over a large area, to concentrate and gain in intensity what it loses in extent. We distrust those excessively mobile talents that lend themselves equally to all uses, refusing to choose a special role and keep to it. We disapprove of those men whose unique care is to organize and develop all their faculties, but without making any definite use of them, and without sacrificing any of them, as if each man were sufficient unto himself, and constituted an independent world. It seems to us that this state of detachment and indetermination has something anti-social about it. The praiseworthy man of former times is only a dilettante to us, and we refuse to give dilettantism any moral value; we rather see perfection in the man seeking, not to be complete, but to produce; who has a restricted task, and devotes himself to it; who does his duty, accomplishes his work. “To perfect oneself,” said Secrétan, “is to learn one's role, to become capable of fulfilling one's function... The measure of our perfection is no longer found in our complacence with ourselves, in the applause of a crowd, or in the approving smile of an affected dilettantism, but in the sum of given services and in our capacity to give more.””

[Le principe de la morale, p. 189] … We no longer think that the exclusive duty of man is to realize in himself the qualities of man in general; but we believe he must have those pertaining to his function. … The categorical imperative of the moral conscience is assuming the following form: Make yourself usefully fulfill a determinate function.
Source: The Division of Labor in Society (1893), pp. 42-43.