Let no one, however, suspect that, in speaking as we do, we belong to those who are indeed called Christians, but who set aside the doctrine of the resurrection as it is taught in Scripture. For these persons cannot, so far as their principles apply, at all establish that the stalk or tree which springs up comes from the grain of wheat, or anything else (which was cast into the ground); whereas we, who believe that that which is “sown” is not “quickened” unless it die, and that there is sown not that body that shall be (for God gives it a body as it pleases Him, raising it in incorruption after it is sown in corruption; and after it is sown in dishonour, raising it in glory; and after it is sown in weakness, raising it in power; and after it is sown a natural body, raising it a spiritual),— we preserve both the doctrine of the Church of Christ and the grandeur of the divine promise, proving also the possibility of its accomplishment not by mere assertion, but by arguments; knowing that although heaven and earth, and the things that are in them, may pass away, yet His words regarding each individual thing, being, as parts of a whole, or species of a genus, the utterances of Him who was God the Word, who was in the beginning with God, shall by no means pass away. For we desire to listen to Him who said: “Heaven and earth shall pass away, but My words shall not pass away.”
Source: Against Celsus (New Advent)