The Law in its summation is best explained as 'Love your neighbor', but the Sermon on the Mount was not Law, it is Gospel. Lutherans divide Law (commands) and Gospel (promises). Each article of the Sermon on the Mount are promises, not commands. To do so places a bar so high that you will despair and fall away from the faith.
How can you command someone to be 'Poor in Spirit', or 'Be a Peacemaker', God only blesses those who are and who among us is not Poor in Spirit to begin with.
Doctrinal 'mumbo jumbo'. Heh, you just created your own Doctrine. That is Post-Modernism for you. That is your true philosophy, moralistic therapeutic deism.
Luther himself preached Christ word. Our Doctrine is called the 'normed norm' that is it is normed by the 'norming norm' of Scripture. That is the Book of Concord, our Confession as Christ taught us to Confess.
May the LORD bless you and keep you
May the LORD make His face shed light upon you and be gracious unto you
May the LORD lift up His face unto you and give you peace
Follow me on Twitter @ http://twitter.com/Burning_Sirius