III. The mutual assistance and encouragement which this confluence of converts shall give to one another. Their pious affections and resolutions shall be so intermixed that they shall come in in one full stream. As, when the Jews from all parts of the country went up thrice a year to worship at Jerusalem, they called on their friends in the road and excited them to go along with them, so shall many of the Gentiles court their relations, friends, and neighbours, to join with them in embracing the Christian religion (v. 3): "Come, and let us go up to the mountain of the Lord; though it be uphill and against the heart, yet it is the mountain of the Lord, who will assist the assent of our souls towards him." Note, Those that are entering into covenant and communion with God themselves should bring as many as they can along with them; it becomes Christians to provoke one another to good works, and to further the communion of saints by inviting one another into it: not, "Do you go up to the mountain of the Lord, and pray for us, and we will stay at home;" nor, "We will go, and do you do as you will;" but, "Come, and let us go, let us go in concert, that we may strengthen one another's hands and support one another's reputation:" not, "We will consider of it, and advise about it, and go hereafter;" but, Come, and let us go forthwith. See Ps. cxxii. 1. Many shall say this. Those that have had it said to them shall say it to others. The gospel church is here called, not only the mountain of the Lord, but the house of the God of Jacob; for in it God's covenant with Jacob and his praying seed is kept up and has its accomplishment; for to us now, as unto them, he never said, Seek you me in vain, ch. xlv. 19. Now see here, 1. What they promise themselves in going up to the mountain of the Lord; There he will teach us of his ways. Note, God's ways are to be learned in his church, in communion with his people, and in the use of instituted ordinances—the ways of duty which he requires us to walk in, the ways of grace in which he walks towards us. It is God that teaches his people, by his word and Spirit. It is worth while to take pains to go up to his holy mountain to be taught his ways, and those who are willing to take that pains shall never find it labour in vain. Then shall we know if we follow on to know the Lord. 2. What they promise for themselves and one another: "If he will teach us his ways, we will walk in his paths; is he will let us know our duty, we will by his grace make conscience of doing it." Those who attend God's word with this humble resolution shall not be sent away without their lesson.