In God’s appointed and acceptable time, he is pleased to call effectually (Ro 8:30; 11:7; Eph 1:10-11; 2Th 2:13-14), by his Word and Spirit, those he has predestined to life. He calls them out of their natural state of sin and death to grace and salvation by Jesus Christ (Eph 2:1-6). He enlightens their minds spiritually and savingly to understand the things of God (Ac 26:18; Eph 1:17-18). He takes away their heart of stone and gives them a heart of flesh (Eze 36:26). He renews their wills and by his almighty power turns them to good and effectually draws them to Jesus Christ (Dt 30:6; Eze 36:27; Eph 1:19). Yet he does all this in such a way that they come completely freely, since they are made willing by his grace (Ps 110:3; SS 1:4).
This effectual call flows from God’s free and special grace alone, not from anything at all foreseen in those called. Neither does the call arise from any power or action on their part (2Ti 1:9; Eph 2:8); they are totally passive in it. They are dead in sins and trespasses until they are made alive and renewed by the Holy Spirit (1Co 2:14; Eph 2:5; Jn 5:25). By this they are enabled to answer this call and to embrace the grace offered and conveyed in it. This response is enabled by a power that is no less than that which raised Christ from the dead (Eph 1:19-20).
Elect infants dying in infancy are regenerated and saved by Christ through the Spirit (Jn 3:, 5-6), who works when and where and how he pleases (Jn 3:8). The same is true of every elect person who is incapable of being outwardly called by the ministry of the Word.
Those who are not elected will not and cannot truly come to Christ and therefore cannot be saved, because they are not effectually drawn by the Father (Jn 6:44-45, 65; 1Jn 2:24-25). They may even be called by the ministry of the Word and may receive some ordinary working of the Spirit without being saved (Mt 13:20-21; 22:14; Heb 6:4-5). Much less can any be saved who do not receive the Christian religion, no matter how diligently they live their lives according to the light of nature and the teachings of the religion they profess (Ac 4:12; Jn 4:22; 17:3).