Writing of our wonderful Savior, the beloved apostle John wrote, "And he is the propitiation for our sins; and not for ours only, but also for the sins of the whole world" (1 John 2:3).
The Holy Ghost said that by the grace of God, Jesus Christ tasted death for every lost person (Hebrews 2:9).
If Jesus is every lost person's Savior, why isn't every lost person saved? The answer to this question is very easy. The Lord Jesus saves only those who respond to His call to salvation, which is in the Gospel (2 Thessalonians 2:14). He saves only those who get into Him and put Him on in water baptism (Romans 6:3; Galatians 3:27).
Baptism that puts one into Christ, and by which one puts on Christ has to be preceded by one's faith in Christ as God's Son, the Savior who came down from above (John 8:21-24). Baptism must also be preceded by repentance of sin, and by confession that Jesus is God's Son (Acts 2:38; Romans 10:9,10).