One of the first questions of the Bible came from God Himself as He called to fallen Adam, hiding in fear from His presence: βWhere art thou?β (Gen. 3:9).
Adam and Eve made a great mistake in running and hiding from God, for their plight was hopeless without Him. But none of Adamβs children have done any better than he. In Psalm 14:2,3 we find the Lord scouring the earth, as it were, βto see if there were any that did understand [their need] and seek God,β but the answer was, βNo, not one.β How grateful we may be that in grace He sought us, that the Lord Jesus Christ came βto seek and to save that which was lostβ (Luke 19:10) and that βwe have redemption through His blood, the forgiveness of sins according to the riches of His graceβ (Eph. 1:7).
But another question follows naturally. This question too came from God Himself, as He asked the murderer, Cain: βWhere is Abel thy brother?β (Gen. 4:9). Cain countered with another question: βAm I my brotherβs keeper?β but he soon learned that he was his brotherβs keeper as God drove him out of His presence, not only as punishment to him, but to teach us all that we are indeed responsible for those about us.
The unsaved, who have never responded to Godβs call: βWhere art thou?β should remember that God also asks them, as He did unregenerate Cain: βWhere isβ¦ thy brother?β By rejecting Christ as Savior men are also keeping others out of heaven β others whom they might have been used to win to Christ, had they themselves been saved.
You say: βGod will save those whom He has predestinated.β That is only one side of the coin. Our Lord said to two cities of His day, that if the βmighty worksβ done in them had been done in Tyre and Sidon βthey would have repented long agoβ (Matt. 11:21), and God says that He is βnot willing that any should perishβ (II Pet. 3:9) and has βcommittedβ to His people the βwordβ and βministryβ of reconciliation (II Cor. 5:18,19). source