This is a prayer
However it didn't make sense to me when I looked at it but when I flipped it, it was a little more recognizable. This is most likely a religious Christian prayer because, it’s written in a poem format and also there is a cross in certain areas, which indicates the end of a rhythm. I would say it’s very close to ancient Greek
Here is an example.
Ὃτι μὲν ὑμεῖς, ὦ ἄνδρες Ἀθηναῖοι, πεπόνθατε ὑπὸ τῶν ἐμῶν κατηγόρων, οὐκ οἶδα: ἐγὼ δ' οὖν καὶ αὐτὸς ὑπ' αὐτῶν ὀλίγου ἐμαυτοῦ ἐπελαθόμην, οὕτω πιθανῶς ἔλεγον. καίτοι ἀληθές γε ὡς ἔπος εἰπεῖν οὐδὲν εἰρήκασιν.
