Many people have said different things regarding what happened on the cross. A popular saying is that we killed Jesus with our sin, others say that Jesus took on God's wrath, while others would disagree, saying that's divine child abuse.
I haven't really thought about this until I read this blog post yesterday. It is strangely joyful and humbling to know what happened to Jesus on the cross and understand our salvation biblicaly. To me, it really is the greatest love when someone lays down their life for their friends, especially when that friend is a worthless mess.