"As God hath appointed the elect unto glory, so hath He, by the eternal and most free purpose of His will, foreordained all the means thereunto. Wherefore they who are elected being fallen in Adam are redeemed by Christ, are effectually called unto faith in Christ by His Spirit working in due season; are justified, adopted, sanctified, and kept by His power through faith unto salvation. Neither are any other redeemed by Christ, effectually called, justified, adopted, sanctified, and saved, but the elect only."
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Foreordained all the means thereunto"? and among those means is the elect being sanctified?
"It pleased God, in His eternal purpose, to choose and ordain the Lord Jesus, His only-begotten Son, to be the mediator between God and men, the prophet, priest, and king; the head and Savior of the church, the heir of all things, and judge of the world; unto whom He did, from all eternity, give a people to be His seed, and to be by Him in time redeemed, called, justified, sanctified, and glorified."
God gave a people to His chosen mediator to be sanctified..... but God's grace was not accomplishing that task between eternity and the day of one's salvation?
Chapter 14 of the WCF explains how sanctification is accomplished at the time of salvation "
- They who are effectually called and regenerated, having a new heart and a new spirit created in them, are further sanctified, really and personally, through the virtue of Christ’s death and resurrection, by His Word and Spirit dwelling in them; the dominion of the whole body of sin is destroyed, and the several lusts thereof are more and more weakened and mortified, and they more and more quickened and strengthened, in all saving graces, to the practice of true holiness, without which no man shall see the Lord.
That does not conflict in any way with the earlier WCF statements asserting God's eternal ordaining.