This calling is by the grace of God. As He graciously appeared to the patriarchs, offered better things to them, and moved upon them by His Spirit, so He allures them that they can say: "Immediately I conferred not with flesh and blood." It is grace that draws you to Him and draws you after Him. He constrains His people by a holy violence; being merciful to them, He catcheth hold of them, as He did of lingering Lot. Such is our infirmity, and such a hold the world hath of us, that "the lord said unto the servant, Go out into the highways and hedges, and compel them to come in, that my house may be filled" (Luke 14:23).
Effectual calling is the first gathering of men unto Christ, the first making of men to come to Christ, the first putting of a man into the estate of grace. It is the very portal to religion, the very entry into eternal life; it is the first bringing of a man to partake of the Lord Jesus Christ and to have fellowship with Him.
It is an abasement of Christ, that he who gives such a ransom to justice for free-grace, should wait for a penny from sinners; that sinners must bid and buy, and engage him to give, and Christ say, you must give me more, I must sell, not give grace for nothing. Your penny-worths cannot roll about that everlasting wheel of free-grace, the decree of election, or bow or break Christ's free heart to save you, rather than another.https://www.monergism.com/christ-dying-and-drawing-sinners-himself-ebook
The manner of grace's working on saints is gracious, and so essentially free; as is evident in our first drawing to Christ, when many sins are forgiven, and so the soul loves much; and the sweetest burden in heaven, or out of heaven, is a burden of the love of Christhttps://www.monergism.com/christ-dying-and-drawing-sinners-himself-ebook
Effectual calling is an act of the grace of God in Christ by which he calls men dead in sin and lost in Adam through the preaching of the Gospel and the power of the Holy Spirit, to union with Christ and to salvation obtained in him.