Chrestomathy (/krɛsˈtɒməθi/ kres-tom-ə-thee; from the Ancient Greek χρηστομάθεια “desire of learning” = χρηστός “useful” + μανθάνω “learn”) is a collection of choice literary passages, used especially as an aid in learning a subject.κἀν τῇ πρὸς Κολασσαεῖς ἐπιστολῇ νουθετοῦντες γράφει πάντα ἄνθρωπον καὶ διδάσκοντες ἐν πάσῃ σοφίᾳ, ἵνα παραστήσωμεν πάντα ἄν1.1.16.1 θρωπον τέλειον ἐν Χριστῷ. ἁρμόζει δὲ καὶ ἄλλως τῇ τῶν ὑπομνημάτων ὑποτυπώσει τὸ γλαφυρὸν τῆς θεωρίας. αὐτίκα καὶ ἡ τῆς χρηστομαθίας περιουσία οἷον ἥδυσμά τί ἐστιν παραπεπλεγμένον ἀθλητοῦ βρώματι, οὐ τρυφητιῶντος, ὄρεξιν δὲ ἀγαθὴν <διὰ> φιλοτιμίαν λαμβάνοντος. [Stromata 1.1.16.1]
Also in the Epistle to the Colossians he writes, "Admonishing every man, and teaching every man in all wisdom, that we may present every man perfect in Christ." The nicety of speculation, too, suits the sketch presented in my commentaries. In this respect the chrestomathy are like a relish mixed with the food of an athlete, who is not indulging in luxury, but entertains a noble desire for distinction.
In philology or in the study of literature, it is a type of reader which presents a sequence of example texts, selected to demonstrate the development of language or literary style. It is different from an anthology because of its didactic purpose.