Every human stands guilty of sin before a Holy God who rightfully claims all as His own. We all deserve eternal separation from Him - the just penalty for sin - also known as hell.
God, in his mercy willed to forgive sinful men, and being truly merciful, willed to forgive them righteously, that is, without in any way condoning their sin. Thus He purposed to direct against his own very Self in the person of his Son the full weight of that righteous wrath which they deserved.
Jesus stands alone as the solution to the problem that plagues humanity. He is the door - he does not show us the door, he does not demonstrate the correct behaviour which shall open the door - HE IS THE DOOR!
No one gets to the Father except THROUGH Him.