God has given to His Son, Jesus Christ, a people of His own choosing, not according to anything they have done, but solely according to the will and purpose of God. The purpose in them being given to the Son is salvation. Christ would die for these, and these alone, and give unto them eternal life. These are the only people Jesus Christ has made atonement for; The only ones He became a curse for upon the Tree; The only ones whose sins were imputed to Christ and Whose Righteousness was/will be imputed to them. These are the same people who will be presented to the Father in a blessed state. All others were not given to the Son; they are not among those to whom Christ will give eternal life and therefore could not have been among those for whom He died and become a curse for on the Tree. They are not among those blessed of the Father, for they are declared 'cursed' on Judgement Day.