God has elected a group of people before the foundation of the world (Ephesians 1v4) whom He has adopted as his children and whom He will save from sin, Satan and his wrath.
These people are chosen not because of what they have done, but because God wants them (Romans 9v11). There is no visible mark on the heads of these elect, but they will be clearly seen when God separates the goats from the sheep (Matthew 25v32).
We don’t always get what we want. We want world peace, but we don’t have it. We want corruption to end, but it occurs daily.
Then there are things we want and get at a great cost. People who live from hand to mouth sacrifice meals to put their children through school. There are many examples of sacrifices made for things wanted, but the greatest want fulfilled by a sacrifice made, was by God. The sacrifice made by God does not reflect the value of the objects of his want, but his love for the objects that He wants.
God wants his elect to be with him so much that “He gave his only Son, that whoever believes in Him should not perish but have eternal life” (John 3v16).
He sent his Son to earth as a baby boy who lived a perfect life, filled with righteousness. His elect were born with disobedient hearts and by nature deserve his punishment (Ephesians 2v3). Jesus Christ therefore dies on a cross and receives the punishment meant for God’s elect (Galatians 1v4). God receives what He wants – a people holy and blameless – not because of what they have done, but because of the sacrifice He made by sending his Son (Titus 3v5-7). He keeps what He receives, therefore the good work He has started in them by saving them, He will complete (Philippians 1v6).