I'm a new comer and happy to be part of the house. Ralph's teaching on the Sermon on the mount is refreshing and sparked up my spiritual antenal.
The two parts of the Beatitudes are what you have to do in this physical realm and the corresponding reward in the spiritual realm.
Our Lord Jesus Christ is emphasising we are not of this world, so we must learn and understand the Principles of abiding with him (kingdom of God).
I think Jesus made a clear and straight forward statement here about the kingdom life, though seemed paradoxical to get audience attention.
The 'part a' of the Beatitudes and the fruits of the Spirit are the outward signs of Christ (kingdom of God) in dwelling us.