the good and the evil cannot well agree, and the evil can yet less agree with one another.
 Samuel Johnson, The History of Rasselas, Prince of Abissinia (1759). copy citation

Context

“I am unwilling to believe that the most tender of all relations is thus impeded in its effects by natural necessity.” “Domestic discord,” answered she, “is not inevitably and fatally necessary, but yet it is not easily avoided. We seldom see that a whole family is virtuous; the good and the evil cannot well agree, and the evil can yet less agree with one another. Even the virtuous fall sometimes to variance, when their virtues are of different kinds and tending to extremes. In general, those parents have most reverence who most deserve it, for he that lives well cannot be despised.” source