God is the one who calls a person to be a disciple of Jesus. Our natural, sinful self cannot comprehend God’s calling. 1 Corinthians 1:21, “…the world by wisdom knew not God…” Jesus asked Peter, “…who do you say that I am? And Simon Peter …said, You are the Christ, the Son of the living God…And Jesus…said to him…this knowledge has not come to you from flesh and blood, but from my Father in heaven.” Matthew 16:15-17. So, God must open your heart and understanding to His call. “For ye see your calling, brethren, how that not many mighty, not many noble, are called: but God hath chosen the foolish…” 1Corinthians 1:26.
However, do not confuse the high calling to be part of the Church class with the general salvation offered to the world during Christ’s reign. Now, “…many are called, but few are chosen” (Matthew 22:14) and “those with him (the Lamb in heaven) are called and chosen and faithful” (Revelation 17:14). But during Christ’s kingdom, “…in Christ shall all be made alive” (1Corinthians 15:22). “This is good, and it is pleasing in the sight of God our Savior, who desires all people to be saved and to come to the knowledge of the truth” (1 Timothy 2:4).
Yes, Jesus is the ransom for all. Few now comprehend and hear the heavenly call to follow Jesus. But during Christ’s 1,000 year reign on earth, all the rest of mankind will be resurrected, healed (Isaiah 35), and taught of God (Jeremiah 31:34). All will have the opportunity to receive eternal life on earth if they obey God’s loving, holy will.