Question: What do you mean by saying that Jesus took our sins upon himself?
Answer: The Lord’s human nature was without sin. He died for us on the Cross. He knew that He had to offer a sacrifice. The prototypes of the sacrifice at the Calvary in the Old Testament Church were lambs and doves, killed on the altar. The Lord took the guilt of the entire humankind because He could do so as our Creator, and He had the right to do so. He nailed the sins of the entire world to the Cross. Things like these sometimes happen in our everyday lives, too: if someone is guilty and the other person takes his guilt upon himself, then the guilty person is released and the other person is punished instead. We know that Nun Maria (Skobtsova) went to a gas chamber during the war instead of a woman who had children. She died for the woman and her kids to remain alive. We know such cases from history. However, only Jesus Christ—only God—could redeem everyone and allow to choose between life and death. That’s what He did by dying on the Cross.
The apostle tells us: "Each of you is a temple of the Holy Spirit." Every human being is a temple. Some temples are built by people and consecrated as houses of the Lord. Other temples of God are not built by hand.
Many become Orthodox in the same way: not by logic, deliberation, and research, but by the workings of the Holy Spirit that make the presence of God visible to us.
St Justin Martyr quoted God as saying, “In whatsoever things I shall take you, in these I shall judge you.” (Dialogue with Trypho, Chapter 47, cf. Matthew 24: 42).
The hardest, most painful and responsible phenomenon in our life is death. The world wasn’t created for dying and for people to bury their dead, but for people and other living creatures to live and rejoice.