Philo Judaeus De Cherubim 42

[42] But that we may describe the conception and the parturition of virtues, let the superstitious either stop their ears, or else let them depart; for we are about to teach those initiated persons who are worthy of the knowledge of the most sacred ¹ mysteries, the whole nature of such divine and secret ordinances. And those who are thus worthy are they who, with all modesty, practise genuine piety, of that sort which scorns to disguise itself under any false colours. But we will not act the part of hierophant or expounder of sacred mysteries to those who are afflicted with the incurable disease of pride of language and quibbling expressions, and juggling tricks of manners, and who measure sanctity and holiness by no other standard.