In John 1:18, the apostle wrote: No one has seen God at any time.
Exodus 33:20 God said to Moses: You cannot see My face; for no man can see Me and live.
Everyone who walked and talked with Jesus between His conception and His ascension saw God.
Peter, James and John saw Jesus glorified on the Mount of Transfiguration.
At Jesus’ baptism in the Jordan, the Holy Spirit appeared “in the form of a dove” and was seen by many.
At Jesus’ baptism and at the Transfiguration, the Father’s voice was heard.
John 1:14 And the Word was made flesh, and dwelt among us, (and we saw his glory, the glory as it were of the only begotten of the Father,) full of grace and truth.
John 14 8Philip saith to him: Lord, shew us the Father, and it is enough for us. 9Jesus saith to him: Have I been so long a time with you; and have you not known me? Philip, he that seeth me seeth the Father also. How sayest thou, Shew us the Father?
Now ... having disposed of your objection, let us examine the reason I posted that:
You wrote: “He is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.”
I wrote: “Eternal Father, I offer You the Body and Blood, Soul and Divinity of Your dearly beloved Son, Our Lord Jesus Christ, in atonement for our sins and those of the whole world.”
Fascinating, the similarity. Congratulations: You’re closer to being Catholic than you realize.
I can't be sure ... I'm not a mind reader. ;'}