Christianity only a mask?
They say that a certain showman in the city of Alexandria, having trained a monkey to dance with some grace, and having dressed him in a dancer's mask and a costume suitable for the occasion, and having surrounded him with a chorus, gained fame by the monkey's twisting himself in time with the music and concealing his nature in every way by what he was doing and what he appeared to be. While the audience was charmed by the novelty of the spectacle, one of the clever persons present, by means of a trick, showed those watching the performance that the dancer was a monkey. When everyone was crying out and applauding the gesticulations of the monkey, who was moving rhythmically with the music, they say that he threw onto the dancing place some of the sweets which arouse the greediness of such animals; whereupon the monkey, without a moment's delay, when he saw the almonds scattered in front of the chorus, forgetting the dancing and the applause and the elaborate costume, ran after them and grabbed what he found in the palm of his hands. And in order that the mask would not get in the way of his mouth, he energetically threw aside the disguise with his nails and immediately evoked a laugh from the spectators in place of the praise and admiration, as he turned out to be ugly and ridiculous without his mask.
Therefore, just as the costume was not sufficient for that creature to be considered a man, once his nature was disclosed in the incident of the sweets, so those individuals not truly shaping their own natures by faith will easily be disclosed in the temptations of the devil as being something other than what they are called (Christians). For, instead of a fig or an almond or some such thing, vanity and love of honor and love of gain and love of pleasure, and whatever else the evil assembly of the devil places before greedy men instead of sweets, easily bring to light the ape-like souls who, through pretense and imitation, play the role of the Christian and then remove the mask of moderation or meekness or some other virtue in a moment of personal crisis. It is necessary, therefore, for us to understand what the name 'Christian' means, for then, perhaps, we will become what the term implies and not be exposed by the one who perceives what is hidden, namely, that we have disguised ourselves by mere assent and by the pretense of the name alone when we are actually something contrary to what we appear to be.
Saint Gregory of Nyssa, To Call Oneself a Christian