§7.13.1Οἷόν ἐστιν ἐν ἡνωμένοις τὰ μέλη τοῦ σώματος, τοῦτον ἔχει τὸν λόγον ἐν διεστῶσι τὰ λογικά, πρὸς μίαν τινὰ συνεργίαν κατεσκευασμένα.
The relation which the limbs of the body have in unified entities, rational beings—constituted for a single cooperation—have in separate entities.
μᾶλλον δέ σοι ἡ τούτου νόησις προσπεσεῖται, ἐὰν πρὸς ἑαυτὸν πολλάκις λέγῃς, ὅτι μέλος εἰμὶ τοῦ ἐκ τῶν λογικῶν συστήματος. ἐὰν δὲ διὰ τοῦ ῥῶ στοιχείου μέρος εἶναι ἑαυτὸν λέγῃς, οὔπω ἀπὸ καρδίας φιλεῖς τοὺς ἀνθρώπους· οὔπω σε καταληκτικῶς εὐφραίνει τὸ εὐεργετεῖν· ἔτι ὡς πρέπον αὐτὸ ψιλὸν ποιεῖς, οὔπω ὡς ἑαυτὸν εὖ ποιῶν.
The understanding of this will strike you more forcibly if you say to yourself often: "I am a limb of the system composed of rational beings." But if, using the letter rho, you say that you are a part, you do not yet love human beings from the heart; doing good does not yet delight you with full conviction; you still do it merely as a proper thing to do, not yet as doing good to yourself.