{Rev.22:2} «In the midst of the street of it (of heavenly Jerusalem) and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations».
The given place of the Scripture shows, how that place (i.e. Paradise middle) where the life tree grows looks. So, Paradise is in heavenly Jerusalem. The author of the given book not so unitary could write about heavenly Jerusalem, for example in the book «Gold City», chapters 2, 4, 5, 16, 17, and also notes to points 5, 8, 10, 12, 16 in the same book. The heavenly City consists of three heavens: the First, Second and Third heaven. As Apostle Paul speaks, he has been caught up in Paradise to the third heaven. So, Paradise is in heavenly Jerusalem in the third Heaven. The description of the heavenly City is given in 21st chapter of the book of Revelation. The description of the heavenly City proceeds and in 22nd chapter of the book of Revelation, verses from 1 to 5 and 14.
{Rev.22:14} «Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the City». Under the name of City heavenly Jerusalem here means, also the tree of life growing in the City here is mentioned. Unfortunately, almost all above-stated places of the Scripture about Paradise God's are read seldom and if are read are not compared the each with other.*19