Verses 2–3
third heaven
First heaven, of clouds; second, of stars; third, God's abode.
Verses 4–6
paradise
See note on hades, (See Scofield "Luke 16:23").
Verses 7–8
thorn
It has been conjectured that Paul's "thorn in the flesh" was chronic ophthalmia, inducing bodily weakness, and a repulsive appearance Galatians 4:15; 1 Corinthians 2:3,4; 2 Corinthians 10:10. This cannot be positively known, and the reserve of Scripture is as sure a mark of inspiration as its revelations. Paul's particular "thorn" is not described that his consolations may avail for all to who any thorn is given.
Verses 9–20
perfect in
(See Scofield "Matthew 5:48").
Verse 21
sinned
Sin. (See Scofield "Romans 3:23").