SEV Biblia, Chapter 8:21
El entonces respondiendo, les dijo: Mi madre y mis hermanos son los que oyen mi palabra, y la hacen.
John Gill's Bible Commentary
Ver. 21. And he answered and said unto them , etc.] Not to his mother and brethren, but to those that told him of them, who either designed to reproach him with them, by reason of the meanness of them, or to interrupt him in his work: my mother and my brethren are these ; pointing to his disciples: which hear the word of God ; which he had been preaching, and was meant by the seed in the preceding parable: and do it ; behave in their lives and conversations agreeably to it; and observe the precepts and ordinances in it; elsewhere called the will of God his Father; (See Gill on Matthew 12:49-50).
Matthew Henry Commentary
Verses 4-21 - There are many very needful and excellent rules and cautions for hearing the word, in the parable of the sower, and the application of it. Happy are we, and for ever indebted to free grace, if the sam thing that is a parable to others, with which they are only amused, in a plain truth to us, by which we are taught and governed. We ought to take heed of the things that will hinder our profiting by the word we hear; to take heed lest we hear carelessly and slightly, lest we entertain prejudices against the word we hear; and to take heed to ou spirits after we have heard the word, lest we lose what we have gained The gifts we have, will be continued to us or not, as we use them for the glory of God, and the good of our brethren. Nor is it enough not to hold the truth in unrighteousness; we should desire to hold forth the word of life, and to shine, giving light to all around. Grea encouragement is given to those who prove themselves faithful hearer of the word, by being doers of the work. Christ owns them as his relations.
Greek Textus Receptus
ο 3588 T-NSM δε 1161 CONJ αποκριθεις 611 5679 V-AOP-NSM ειπεν 2036 5627 V-2AAI-3S προς 4314 PREP αυτους 846 P-APM μητηρ 3384 N-NSF μου 3450 P-1GS και 2532 CONJ αδελφοι 80 N-NPM μου 3450 P-1GS ουτοι 3778 D-NPM εισιν 1526 5748 V-PXI-3P οι 3588 T-NPM τον 3588 T-ASM λογον 3056 N-ASM του 3588 T-GSM θεου 2316 N-GSM ακουοντες 191 5723 V-PAP-NPM και 2532 CONJ ποιουντες 4160 5723 V-PAP-NPM αυτον 846 P-ASM
Robertson's NT Word Studies
8:21 {These which hear the word of God and do it} (hoi ton logon tou qeou akouontes kai poiountes). The absence of the article with "mother" and "brothers" probably means, as Plummer argues, "Mother to me and brothers to me are those who etc.." No one is a child of God because of human parentage (#Joh 1:13). "Family ties are at best temporal; spiritual ties are eternal" (Plummer) . Note the use of "hear and do" together here as in #Mt 7:24; Lu 6:47 at the close of the Sermon on the Mount. The parable of the sower is almost like a footnote to that sermon. Later Jesus will make "doing" a test of friendship for him (#Joh 15:14).