Here, however, he also uses reasoning. Having proved the truth by the words of the Scriptures, he now forcefully directs his speech against those who do not believe the Scriptures and says, 'Fool, what you sow.'
That is, you have in yourself proof of the resurrection in what you do every day, and do you still doubt?
I call you foolish because you do not know what is done every day by you yourself. Though you yourself are the cause of the resurrection of seeds, you doubt this with respect to God.
He says very expressively, 'What you sow,' that is, you who are mortal and subject to dissolution.
And see how his very expressions correspond to the present subject. He says, 'It is not made alive unless it dies.' He does not use expressions belonging to seeds, such as sprouting, growing, rotting, or decaying.
Rather, he introduces words corresponding to our flesh: 'It is not made alive unless it dies,' which is proper not to seeds, but to bodies.
And he did not say, 'It will live after it dies,' but something stronger: that it lives because it dies. Do you see how he draws the contrary conclusion?
The very thing from which others drew a conclusion against the resurrection, he turns into proof of the resurrection. They said that the body will not rise because it died.
What does he say in opposition to this? If it had not died, it would not have risen. Therefore it will rise because it dies.
In a similar way Christ clearly shows the same thing when He says, 'Unless a grain of wheat falls to the ground and dies, it remains alone; but if it dies, it bears much fruit' (Jn 12:24).
Taking the comparison from this, Paul did not say, 'It will not live,' but, 'It is not made alive' (ou zoopoieitai). He again points to the power of God and teaches that not the nature of the earth, but God Himself, accomplishes all" (St. Chrysostom).