"Spirit" is ruach, and it is used in the sense of invisible force or power. Thus ruach, depending on the context, is used to express intelligence, will, truth, hope, faith, knowledge, wisdom, discernment, omnipotence, omnipresence, infinity, invisibility, or holiness. These words are different from those in reference to God's soul (see Leviticus 26:11), which had to do mostly with feelings, with emotional qualities. Here ruach covers aspects that have to do with mind power.
John W. Ritenbaugh
Image and Likeness of God (Part 1)