SEV Biblia, Chapter 3:15
Y que tuviesen potestad de sanar enfermedades, y de echar fuera demonios.
Clarke's Bible Commentary - Mark 3:15
Verse 15. To have power to heal-and to cast out devils] The business of a minister of Christ is, 1st. To preach the Gospel. 2dly. To be the physician of souls. And, 3dly. To wage war with the devil, and destroy his kingdom.
John Gill's Bible Commentary
Ver. 15. And to have power to heal sicknesses , etc..] All manner of corporeal diseases that attend men and women: and to cast out devils ; from such who were possessed with them: that is, he chose and appointed them to be his apostles, with a view of conferring such powers upon them hereafter; for as yet, they were not vested with them, nor sent out to exercise them; no, not till near twelve months after.
Matthew Henry Commentary
Verses 13-21 - Christ calls whom he will; for his grace is his own. He had called the apostles to separate themselves from the crowd, and they came unto him He now gave them power to heal sicknesses, and to cast out devils. Ma the Lord send forth more and more of those who have been with him, an have learned of him to preach his gospel, to be instruments in his blessed work. Those whose hearts are enlarged in the work of God, can easily bear with what is inconvenient to themselves, and will rathe lose a meal than an opportunity of doing good. Those who go on with zeal in the work of God, must expect hinderances, both from the hatre of enemies, and mistaken affections of friends, and need to guar against both.
Greek Textus Receptus
και 2532 CONJ εχειν 2192 5721 V-PAN εξουσιαν 1849 N-ASF θεραπευειν 2323 5721 V-PAN τας 3588 T-APF νοσους 3554 N-APF και 2532 CONJ εκβαλλειν 1544 5721 V-PAN τα 3588 T-APN δαιμονια 1140 N-APN
Vincent's NT Word Studies
15. To have power (ecein exousian). Note that he does not say to preach and to cast out, but to preach and to have authority to cast out. The power of preaching and the power of exorcising were so different that special mention is made of the divine authority with which they would need to be clothed. The power of driving out demons was given that they might apply it in confirmation of their teaching. Compare xvi. 20.