Why does God say that it is His will that all might be saved but some aren’t?

Question:
Why does it say in God’s Word that it is His will that all men might be saved, and some aren’t? Can we pray in faith that they will be saved?

Answer:
We are told to pray for “all men,” and that it is God’s desire: “Who will have all men to be saved, and to come to the knowledge of the truth” (1 Timothy 2:1 and 4).

But it is man’s responsibility to receive salvation. “As many as received Him, to them gave He the power to become the sons of God, even to them that believe on His name” (1 John 1:12).