90. Q. What did God the Father undertake in the covenant of grace?
        A. By His goodness and mercy, God the Father elected, and determined to justify, adopt and sanctify those for whom Christ should die.

(Click through to read scriptural proof.)

• Exodus 33:18-19

  Moses said, “Please show me your glory.” And he said, “I will make all my goodness pass before you and will proclaim before you my name ‘The LORD.’ And I will be gracious to whom I will be gracious, and will show mercy on whom I will show mercy.

• Ephesians 1:3-5

  Blessed be the God and Father of our Lord Jesus Christ, who has blessed us in Christ with every spiritual blessing in the heavenly places, even as he chose us in him before the foundation of the world, that we should be holy and blameless before him. In love he predestined us for adoption as sons through Jesus Christ, according to the purpose of his will,

• Romans 8:29-33

  For those whom he foreknew he also predestined to be conformed to the image of his Son, in order that he might be the firstborn among many brothers.  And those whom he predestined he also called, and those whom he called he also justified, and those whom he justified he also glorified.

  What then shall we say to these things? If God is for us, who can be against us? He who did not spare his own Son but gave him up for us all, how will he not also with him graciously give us all things? Who shall bring any charge against God’s elect? It is God who justifies.

• Galatians 4:4-7

  But when the fullness of time had come, God sent forth his Son, born of woman, born under the law, to redeem those who were under the law, so that we might receive adoption as sons. And because you are sons, God has sent the Spirit of his Son into our hearts, crying, “Abba! Father!” So you are no longer a slave, but a son, and if a son, then an heir through God.

• Hebrews 10:9-10
  

  …then he added, “Behold, I have come to do your will.” He does away with the first in order to establish the second. And by that will we have been sanctified through the offering of the body of Jesus Christ once for all.

• 1 Corinthians 1:8-9
  

  …who will sustain you to the end, guiltless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of his Son, Jesus Christ our Lord.

• Philippians 1:6

  And I am sure of this, that he who began a good work in you will bring it to completion at the day of Jesus Christ.

• 1 Thessalonians 4:3, 7

  For this is the will of God, your sanctification: that you abstain from sexual immorality…

  For God has not called us for impurity, but in holiness.

• 1 Thessalonians 5:23-24

  Now may the God of peace himself sanctify you completely, and may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ. He who calls you is faithful; he will surely do it.