This is the text of the early 1928-31 lectures of the great Swiss theologian. Later important discussions are to be found throughout his monumental Church Dogmatics. Although almost impossible to divide out 'ethical' sections here, see especially I/2, §22 (Dogmatics as ethics), II/2, §36-39 (The Command of God), III/4 (The Command of God the Creator), IV/2, §68 (Christian Love), and the fragments of IV/4 published as The Christian Life (The Command of God the Reconciler). In this volume there is an important discussion of conscience at pp 475-97.