This is a bit of a complex question, but we'd probably say that we believe what we say in The Apostle's Creed.
As Lutherans, we believe that it is through...
We are saved not by our good deeds but by God's Grace alone. "Being justified freely by his grace through the redemption this is in Christ Jesus" - Romans 3:24
Jesus was the substitute for all people of all time. By His suffering and death, He purchased and won forgiveness and eternal life for us all. God's word says that we are saved by grace through "faith in Christ Jesus and not by our own efforts or works" - Ephesians 2:8-9
We view the Bible as God's inerrant and infallible Word. Through it, God reveals our frailty and need to be saved from our sins. The scriptures are the only place that we look to truly express our beliefs - not politics, traditions, or human reason.