First summary of looking at Barth's ethics: One can only do ethics in light of our election in Christ. For Barth, Christ is the Electing/Sanctifying God and the Elected/Sanctified Human that I beleive St. Paul says we find our place in. thus, any type of ethics must be based off this "covenantal ontology". By being-in-act as both the Elector and the Elected, Christ followed the "command" of God in "humility" and "obedience". Thus, when Barth later talks about ethics following the "command of God" for humans it is in the light of God's own humility that was added on through Christ.