Married To Another

How is David a type of the LORD Jesus Christ? If one is married to Christ, can there be any problem that He can't take care of? How was Abigail drawn to Christ? Can God harken to just anyone's voice? Who is it that can speak peace to a sinner? What is it to be wise as a serpent? Why is the Message of Salvation to some condemnation and to some a sweet Message of Salvation? Why did David rejoice when His enemy died?