The planting of a seed and the harvesting of a crop will help you understand many areas of the Christian life. Paul adds resurrection to the list of seed-time and harvest teachings. We are a seed. And like a seed, when we are placed in the earth, we will bring a harvest one day. Resurrection day is harvest time.
Every seed has a shell and a heart.
So do God's people. Our body is the shell which surrounds our eternal heart. If we better understand a seed, we can better understand resurrection and our future resurrection body. When the shell of the seed dissolves in the ground, the life is released from the seed's heart. So it is with our physical body.