Charles Ellicott Commentary Isaiah 49:6

"yea, he saith, It is too light a thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth." — Isaiah 49:6 (ASV)

And he said. —The words are repeated from says the Lord of the preceding verse, where they had been followed by a long parenthesis. The Servant becomes conscious of a higher mission. All national barriers are broken down. He is to be the bearer of a message of peace to the whole race of mankind, and has other sheep not of this fold (John 10:16).