"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?" (Romans 8: 32)
There are two alls in this verse.
Jesus died for us all.
He died for the "worst" of us (even though before God, no one is good, because we are all dead in Adam).
He died for those who were not yet born.
He died for all the sins of man, from Adam to eternity.
The crossing of the river Jordan demonstrates the fullness of Jesus' payment for all sin:
"And as they that bare the ark were come unto Jordan, and the feet of the priests that bare the ark were dipped in the brim of the water, (for Jordan overfloweth all his banks all the time of harvest,) 16That the waters which came down from above stood and rose up upon an heap very far from the city Adam, that is beside Zaretan: and those that came down toward the sea of the plain, even the salt sea, failed, and were cut off: and the people passed over right against Jericho." (Joshua 3: 15-16)
Joshua means "Savior", and in Joshua 3:16, we read about a Savior who leads the Israelites over the River Jordan, through the payment of all their sins.
All of them.
Jesus was delivered up for us all. When we receive the fullness of this payment, then we can freely receive all things from him, for we have given up justifying ourselves through our own efforts, and believe in the free goodness of His grace.
We receive all things with Him, because all things are ours in Christ:
"21Therefore let no man glory in men. For all things are yours; 22Whether Paul, or Apollos, or Cephas, or the world, or life, or death, or things present, or things to come; all are yours; 23And ye are Christ's; and Christ is God's." (1 Corinthians 3: 21-23)
All things are ours today because we are in Christ, and we are Christ's.
God the Father gave His Son, and with Him we can be certain He gives all things with Him.
One more thing. . .that word "freely receive" is more powerful than the English bears forth:
Part of Speech: Verb
To favor and to forgive.
We have forgotten the first part, in all our talk about the forgiveness we receive in Christ.
We also receive great favor, and God favors us in all things, too!
"To the praise of the glory of his grace, wherein he hath made us accepted in the beloved." (Ephesians 1: 6)
"Accepted" is "highly favored", or χαριτόω, the basis for "freely receive".