In writing this little book, Andrew Murray's object has been to discover in what sense God uses the word, so that it may mean to us what it means to Him. He traces the word through some of the most important passages of Holy Scripture where it occurs, there to learn what God’s holiness is, what ours is to be, and what the way by which we attain it.
Kind of hard to understand some of the writings but very powerful when you are able.
Holy in Christ
A most helpful study in spiritual growth. See also "Principles in Spiritual Growth" by Miles J. Stanford.