Holiness isn’t a word I use often and honestly not a word I think of often because something in me could not resonate with holiness being defined only in terms of morality. The following explanation from Brueggemann’s An Introduction to the Old Testament of “holiness” from a biblical viewpoint makes much more sense to me:
Speaking of the Book of Leviticus Mary Douglas has proposed that chapters 18 and 20 provide a deliberate framework for chapter 19 so that the whole is arranged to show that love of neighbor has become the key component of a vision of holiness. Pg. 72
…in Douglas’s interpretation, the arrangement of the materials serves to subordinate holiness and purity to justice. Pg. 73
This view of biblical holiness makes sense to me as I reflect on the overarching Story of Scripture.