Neither let the son of the stranger The Gentile, who by birth is a stranger to God, and to the commonwealth of Israel. That hath joined himself to the Lord That hath turned from dumb idols to the living God, and to true religion; speak, saying, The Lord hath separated me, &c. For such shall be as acceptable to me as the Israelites themselves, and the partition wall between Jews and Gentiles shall be taken down, and repentance and remission of sins shall be preached and offered to men of all nations. Neither let the eunuch say Who is here joined with the stranger, because he was forbidden to enter into the congregation of the Lord, Deuteronomy 23:1. Under these two instances he understands all those, who, either by birth, or by any ceremonial pollution, were excluded from church privileges, and so he throws open the door to all true believers. Behold, I am a dry tree A fruitless tree, accursed by God with the curse of barrenness. For thus saith the Lord unto the eunuchs, &c. That observe my commands, not by custom, or through force or fear, but by free choice, with love to them, and delight in them. And take hold of my covenant That steadfastly keep the conditions of my covenant. Even unto them will I give in my house, &c. In my temple, an emblem of the Christian church; a place, &c., better than of sons and daughters A far greater blessing and honour than that of having a posterity, even my favour, and my Spirit and eternal felicity.
Related Commentaries of Isaiah 56:3
Isaiah 56:3-5
3 Neither let the son of the stranger, that hath joined himself to the LORD, speak, saying, The LORD hath utterly separated me from his people: neither let the eunuch say, Behold, I am a dry tree.
4 For thus saith the LORD unto the eunuchs that keep my sabbaths, and choose the things that please me, and take hold of my covenant;
5 Even unto them will I give in mine house and within my walls a place and a name better than of sons and of daughters: I will give them an everlasting name, that shall not be cut off.