John 12:24 - I tell you the truth, unless a kernel of wheat falls to the ground and dies, it remains only a single seed. But if it dies, it produces many seeds.
Jesus gives us a picture of what is going to happen to Him by telling us about a kernel of wheat. He often did that. He would take something so simple and use it to help the people understand what He was saying. Really, He was just putting it in words that they would understand. They all knew about wheat.
If you have a seed and just hold onto it, that is all you will have, a single seed. If you want to have more seeds you must let go of the seed you already have. That is the only way. If you hold onto your seed too tight you will never see more than that one seed.You must let it go.
Let the seed fall to the ground and die. Only then will you see the seed multiply. And, as the process continues you will see an exponential increase.
This is how it was with Jesus. He was the only one that was right with God; He was the only child. Then He died and was crucified. Just like the seed, He was buried in the ground and just like the seed He rose again. Now we see the multiplication.
At first Jesus appeared to His disciples. They became the first to be like Jesus. After that they continued to spread the message of Christ and what He has done. Even today the increase is still happening. From the death of one man, all men can enter life with God.