The Idea of the Holy (Unabridged‪)‬

"It is essential to every theistic conception of God, and most of all to the Christian, that it designates and precisely characterizes Deity by the attributes Spirit, Reason, Purpose, Good Will, Supreme Power, Unity, Selfhood. The nature of God is thus thought of by analogy with our human nature of reason and personality; only, whereas in ourselves we are aware of this as qualified by restriction and limitation, as applied to God the attributes we use are 'completed', i.e. thought as absolute and unqualified. Now all these attributes constitute clear and definite concepts: they can be grasped by the intellect; they can be analysed by thought; they even admit of definition.." (Rudolf Otto - The Idea of the Holy)