St. Nilus of Sinai: There is a higher prayer...

'There is a higher prayer -- that of the perfect -- which is a certain ravishing of the mind, its complete separation from all sensory things, when with unutterable sighings of the spirit it approaches God, Who sees the heart open like a written book, wherein its will is expressed in wordless images. 

Thus Paul was ravished to the third heaven, not knowing "whether in the body" or "whether out of the body" [II Corinthians 12:2].'

St. Nilus of Sinai