Ephraem the Syrian
In his Revelation, John saw a great and wondrous book. It was written by God Himself, and there were seven seals upon it.
Neither on earth nor in heaven could anyone read it except the Son of God alone, because He both wrote it and sealed it.
This book is the soul, written in the Kingdom. Apart from the One Who wrote it, no one knows what it is.
No eye can see, no ear can hear, and no heart can imagine what is written in the soul.
The Kingdom is written in the soul and placed in it as a dowry, so that when the Heir of the Kingdom comes, He may bring it with Himself into the bridal chamber.
When the King comes in His glory and the hosts of those born on earth are gathered, then the wise virgins will be made ready and go out to meet Him.
He was betrothed to them and wrote them a book as a dowry.