St. Cyril of Jerusalem has a good quote:
"This body shall be raised, not remaining as it is now. But this same body will be raised.
…It shall abide as an eternal body. It shall no longer require for its life such nourishment as now, nor shall it require a ladder for climbing, for it shall be made a spiritual body, a marvelous thing such as we have not the ability to describe."
- Catechetical Lectures, 18, 1.
St. Cyril also focuses on the Lord’s comment that “The souls of the just shall shine like stars,” and he compares our current bodies to our glorified bodies as being like regular iron vs. molten iron, or a glowworm in the daytime vs. a glowworm at night. (Or if you don’t want to try to picture European worms, think of a firefly, which is much prettier at night.)