What does the concept of substitution mean in Christianity?

Substitution is a vital doctrine in Christian theology, encapsulated in the act of Christ dying in our place. The ram caught in the thicket in Genesis 22 serves as a type of this ultimate reality, where it took the place of Isaac, just as Jesus took upon Himself the sins of humanity. This concept is foundational, proclaiming that God's justice is satisfied through the sacrifice of an innocent substitute. Key New Testament passages affirm this doctrine, such as 2 Corinthians 5:21, which states that Christ became sin for us so that we might become the righteousness of God in Him. It emphasizes the depth of God's love and the seriousness of sin, while assuring believers of their redemption.