John wrote, "Immediately I was in the Spirit; and behold, a throne set in heaven, and One [God] sat on the throne" (Revelation 4:2).  
"In the Spirit" means receiving divinely inspired visions by which John was transported in his mind's eye. John saw a vision of God in all His glory! More detailed info about the help online you can find at PrimeWritings. 
 
        
             
        
        
        
Celtic would be the answer.