Acts 14:3

3 So Paul and Barnabas spent considerable time there, speaking boldly for the Lord, who confirmed the message of his grace by enabling them to perform signs and wonders.

Read Acts 14:3 Using Other Translations

Long time therefore abode they speaking boldly in the Lord, which gave testimony unto the word of his grace, and granted signs and wonders to be done by their hands.
So they remained for a long time, speaking boldly for the Lord, who bore witness to the word of his grace, granting signs and wonders to be done by their hands.
But the apostles stayed there a long time, preaching boldly about the grace of the Lord. And the Lord proved their message was true by giving them power to do miraculous signs and wonders.

What does Acts 14:3 mean?

John Gill's Exposition of the Bible
Acts 14:3

Long time therefore abode they
At Iconium, undaunted and not discouraged, at the treatment they met with: but continued,

speaking boldly in the Lord;
using great freedom of speech, and showing great courage and intrepidity of mind; speaking out, without fear, the doctrines of the Gospel, in the name of the Lord, and depending upon strength, assistance, and support, from him:

which gave testimony unto the word of his grace;
the Gospel, so called, because it is a publication of the grace and favour of God to the sons of men; in the choice of some of them to everlasting life, in the mission of his Son to redeem them, in the justification of them by his righteousness, and in the forgiveness of them through his blood, in the regeneration of them by his Spirit, in adopting them into his family, and making them heirs of eternal life; and because it is a means of implanting his grace in their souls; to this he bore witness, by giving it success, notwithstanding the opposition made against it, and by miracles wrought in confirmation of it, as follows:

and granted signs and wonders to be done by their hands;
such as healing the sick, curing the lame, casting out devils; and the like, whereby a testimony was given to the truth of the doctrine they preached: and it may be observed, that these miraculous works were not wrought by the power of the apostles, but by the power of God; they were only instruments by whom they were done; it was owing to a grant from the Lord, and to his power, that they were performed.

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