ἴδετε ποταπὴν ἀγάπην δέδωκεν ἡμῖν ὁ πατὴρ ἵνα τέκνα θεοῦ κληθῶμεν καὶ ἐσμέν διὰ τοῦτο ὁ κόσμος οὐ γινώσκει ἡμᾶς ὅτι οὐκ ἔγνω αὐτόν   ἀγαπητοί νῦν τέκνα θεοῦ ἐσμεν καὶ οὔπω ἐφανερώθη τί ἐσόμεθα οἴδαμεν ὅτι ἐὰν φανερωθῇ ὅμοιοι αὐτῷ ἐσόμεθα ὅτι ὀψόμεθα αὐτὸν καθώς ἐστιν   καὶ πᾶς ὁ ἔχων τὴν ἐλπίδα ταύτην ἐπ’ αὐτῷ ἁγνίζει ἑαυτὸν καθὼς ἐκεῖνος ἁγνός ἐστιν

Look how much the Father loves us.  Why shouldn’t we be called his children?  We are!  It explains a lot.  People “get” us about as much as they “get” God.  Friends, think of the implications!  We are “children” of God now, but who knows what we’ll grow up to be!  If Jesus is any indication, we’ll someday be just like him.  Whoever lets themselves hope in this will find themselves cleansed - and just as perfect as Jesus.