Romans 8:32 "He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?"

There are three parts to consider in this verse. The first two parts establish the reasoning behind the third one.

The First Part: "He that spared not his own Son"

God spared not His Son. God was not tender in dealing with His Son as the propitiation for the sins of the children of God. It's interesting how this is worded, saying that God "spared not" instead of just saying "God delivered." The use of the language and grammar gives us insight into the why. The phrase "He that spared not" intimates that could have very well spared His own Son, but He bound Himself by love NOT to spare His Son! He bound Himself WITH His Son in covenant before the world began. His counsel will stand and be performed according to God's pleasure! (Isaiah 46:10-11) When God purposes something He stands fast in it and performs it accordingly!

God bound Himself not to spare His Son! How shall he not?

The Second Part: "But delivered him up for us all"

God delivered His son. Now comes the reason God didn't spare His Son. God literally surrendered His Son to be a sacrifice for sin! Peter states, "Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain:" (Acts 2:23) The Jews took Him and crucified Him, but God delivered Him up to be the Saviour of the world! And the Lord Jesus Christ came, bound in and by that
same love, and willingly gave Himself as a ransom for the people of God! God bound Himself to deliver His Son up for us! How shall he not?

The Third Part: "How shall he not with him also freely give us all things"

We cannot bind God. We are unable to constrain God by contracts or deals or promises. However, God, in His sovereignty, has bound Himself by His love for His children! Perhaps one of the most prolific examples of this comes from Hebrews 10:17: "And their sins and iniquities will I remember no more." The sacrifice of Jesus on the cross and the resulting finished work by Christ moved God in His will to remember our sins no more! He didn't forget them; He willed not to remember them! He bound Himself in and by love!

Within context, the "all things" under consideration that are freely given are found in vs. 29-30:

            He foreknew us! How shall He not?
            He predestinated us! How shall He not?
            He called us! How shall He not?
            He justified us! How shall He not?
            He glorified us! How shall He not?   (Rom. 8:28-30)

The God of all glory spared not but delivered, and then bestows in kindness all things unto His children!

God bound Himself to freely give us all things! How shall he not?

"And solemn oaths have bound His love to shower salvation down." - Isaac Watts