“For God so loved the world that He gave His one and only Son
[Jesus], that whoever believes in Him shall not perish but have eternal life.” (John 3:16)
God loved the world and He gave the life of His Son to redeem the world. But what God receives out of the world is the whoever: “whoever believes in Him shall not perish.” That total company of whoevers is the treasure in the field that Jesus
died to purchase. He redeemed the world for the sake of the whoever.
In Titus 2:14 we find the same truth presented again. It is speaking here about Jesus Christ:
. . . who gave Himself for us to redeem us [buy us back] from all wickedness and to purify for Himself a people that are His very own, eager to do what is good.
That is the treasure, a people that are His very own who have been redeemed from the world—redeemed from wickedness, purified, and made zealous to do what is good. And the price was Himself: all He had, all He was. He laid down His life.
He gave Himself to buy that field for the sake of the treasure, His redeemed people.