John Gill Commentary Isaiah 41:9

"thou whom I have taken hold of from the ends of the earth, and called from the corners thereof, and said unto thee, Thou art my servant, I have chosen thee and not cast thee away;" — Isaiah 41:9 (ASV)

You whom I have taken from the ends of the earth
Meaning not Abraham, nor his natural seed; but such who believed in Christ, who dwelt in the furthest parts of the earth, to whom the Gospel came, and by which they were laid hold upon, and apprehended by Christ as his own:

and called you from the chief men thereof ;
from among the great men of the earth, out of their families, courts, and palaces: or rather called them by grace, when such personages were passed by and left; not many noble, not many mighty, being called in those times, (1 Corinthians 1:26) :

and said to you, you are my servant ;
and not only called them by the name, but made them such in reality:

adding, I have chosen you, and not cast you away ;
nor does the Lord cast away any whom he has chosen and foreknown; and therefore being thus dear to God, as all the above titles and acts of grace show, and being secured by him from perishing or being eternally lost, this should encourage them to suffer persecution patiently for his name's sake, and not be afraid of any of their enemies, as follows.