"The Emperor Julian, who restored to the Empire its old religion, which had been abolished by Constantine the Apostate, is justly regarded as an opponent of the Galilean. And, when perusing the petty treatises of Julian, one is struck with the number of ideas this enemy of the Christians held in common with them. He, like them, is a monotheist; with them, he believes in the merits of abstinence, fasting, and mortification of the flesh; with them, he despises carnal pleasures, and considers he will rise in favour with the gods by avoiding women; finally, he pushes Christian sentiment to the degree of rejoicing over his dirty beard and his black finger-nails. The Emperor Julian's morals were almost those of St. Gregory Nazianzen. There is nothing in this but what is natural and usual. The transformations undergone by morals and ideas are never sudden. The greatest changes in social life are wrought imperceptibly, and are only seen from afar. Christianity did not secure a foothold until such time as the condition of morals accommodated itself to it, and as Christianity itself had become adjusted to the condition of morals. It was unable to substitute itself for paganism until such time as paganism came to resemble it, and itself came to resemble paganism."
January 1, 1970
https://en.wikiquote.org/wiki/Julian_(emperor)