I found this to be an interesting description of Christians
But with us there is no desire of vainglory, nor do we indulge in a variety of opinions. For having renounced the popular and earthly, and obeying the commands of God, and following the law of the Father of immortality, we reject everything which rests upon human opinion. Not only do the rich among us pursue our philosophy, but the poor enjoy instruction gratuitously; for the things which come from God surpass the requital of worldly gifts. Thus we admit all who desire to hear, even old women and striplings; and, in short, persons of every age are treated by us with respect, but every kind of licentiousness is kept at a distance. And in speaking we do not utter falsehood. It would be an excellent thing if your continuance in unbelief should receive a check; but, however that may be, let our cause remain confirmed by the judgment pronounced by God. Laugh, if you please; but you will have to weep hereafter. ... As for those who wish to learn our philosophy, we do not test them by their looks, nor do we judge of those who come to us by their outward appearance; for we argue that there may be strength of mind in all, though they may be weak in body.
Address of Tatian the Assyrian (AD 110-172) to the Greeks, chapter 32, from Ante-Nicene Fathers, Volume 2.