God, the Father, has a plan:
Ephesians 2:7 in order that in the coming ages He might show the incomparable riches of his grace, expressed in his kindness to us in Christ Jesus.
Ephesians 2:8 For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast. 10 For we are God’s handiwork, created in Christ Jesus to do good works, which God prepared in advance for us to do.
Ephesians 2:21 In Him the whole building is joined together and rises to become a holy temple in the Lord. 22 And in Him you too are being built together to become a dwelling in which God lives by His Spirit.
Jesus, the Son, volunteered to carry out the plan of the Father
Hebrews 10:5 Therefore, when Christ came into the world, he said: “Sacrifice and offering you did not desire, but a body you prepared for me; 6 with burnt offerings and sin offerings you were not pleased. 7 Then I said, ‘Here I am—it is written about me in the scroll—I have come to do your will, my God.’
The Holy Spirit is being used by Jesus to carry out the Father’s plan.
Jesus said in – John 16:13 But when He, the Spirit of truth, comes, He will guide you into all the truth. He will not speak on his own; He will speak only what He hears, and He will tell you what is yet to come. 14 He will glorify Me because it is from Me that He will receive what He will make known to you. 15 All that belongs to the Father is mine. That is why I said the Spirit will receive from Me what He will make known to you.”