If you plant an acorn, the shell dies, releasing the heart to begin a tree. The bark, trunk, limbs, leaves, and acorns of the emerging tree come from the heart of the planted seed. In a similar way, our resurrection body will come from our eternal heart. Our resurrection body will be eternal because it comes from the eternal part of our being. Every seed has an image in its heart.
Many seeds look alike from the outside.
Only by planting them can we find out what image was in the heart. The image is released when the shell of the seed dies. The image in a seed is fixed. The image in the heart of a seed can never be changed. Whatever image is in our heart at the resurrection will determine our rewards in eternity.