Meanings of mighty miracles in English

And there were many mighty miracles wrought by the hands of the apostles.

10:12 And again, to another, that he may work mighty miracles;

9:18 And who shall say that Jesus Christ did not many mighty miracles?

10:4 For should the mighty miracles be wrought among other nations they would repent, and know that he be their God.

8:18 Thus God has provided a means that man, through faith, might work mighty miracles; therefore he becometh a great benefit to his fellow beings.