Putting these 2 verses together gives us a proper perspective on divine inspiration:
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 2 Tim 3:16KJV
For the prophecy came not in old time by the will of man: but
holy men of God spake as they were moved by the Holy Ghost. 2 Pet 1:21KJV
It was the holy men of God who were inspired, not the literature they produced. All scripture was given by the process of breathing the Spirit of God into regenerate men who were moved to write the words God wanted them to write. It is, likewise, the indwelling Spirit of God in the regenerate believer that recognizes spirit/truth when it is encountered on the receiving end.
Any other doctrine of inspiration is virtually dictation.
The idea of
theopneustos is 'God breathed'. I think He both breathed into the holy men and they breathed out His words.