Gan Eden is higher than the worlds

Gan Eden is higher than worlds, for the soil of Gan Eden is the spiritual dimension that is within the physicality of the world.

Chassidic Discourse of the Lubavitcher Rebbe, Pinchas 5711

The bodies were [and will be] completely spiritual

In truth, before [Adam and Chava] transgressed the command of the Holy One, their bodies were also completely spiritual, like our physical bodies shall be after complete refinement...when comprehension of G-dliness will give life to the body like physical eating and drinking does [at present]. This is what Adam's body was before the sin...that his heel was brighter than the sun.

Ohr Hatorah, Bereishis vol. VII (page 2326 (1163a))