One of the joys of reading books is that it leads to more books (a sickness, that!). The best secondary history books push you to the primary texts. So reading Bynum's book on the resurrection is fun because of the footnotes. Here is one reference. The image of the seed in bird droppings is wild. Death is ... being digested by a bird and dropped in manure in the ground. From such ignominous depths, the God of grace and power (the Creator) resurrects to eternal life.
Theophilus of Antioch ( c. 170 AD) on Resurrection:
Then, as to your denying that the dead are raised-for you say, "Show me even one who has been raised from the dead, that seeing I may believe,"-first, what great thing is it if you believe when you have seen the thing done? Then, again, you believe that Hercules, who burned himself, lives; and that Aesculapius, who was struck with lightning, was raised; and do you disbelieve the things that are told you by God?
But, suppose I should show you a dead man raised and alive, even this you would disbelieve. God indeed exhibits to you many proofs that you may believe Him. For consider, if you please, the dying of seasons, and days, and nights, how these also die and rise again.
And what? Is there not a resurrection going on of seeds and fruits, and this, too, for the use of men? A seed of wheat, for example, or of the other grains, when it is cast into the earth, first dies and rots away, then is raised, and becomes a stalk of corn. And the nature of trees and fruit-trees,-is it not that according to the appointment of God they produce their fruits in their seasons out of what has been unseen and invisible?
Moreover, sometimes also a sparrow or some of the other birds, when in drinking it has swallowed a seed of apple or fig, or something else, has come to some rocky hillock or tomb, and has left the seed in its droppings, and the seed, which was once swallowed, and has passed though so great a heat, now striking root, a tree has grown up.
And all these things does the wisdom of God effect, in order to manifest even by these things, that God is able to effect the general resurrection of all men. And if you would witness a more wonderful sight, which may prove a resurrection not only of earthly but of heavenly bodies, consider the resurrection of the moon, which occurs monthly; how it wanes, dies, and rises again.
Hear further, O man, of the work of resurrection going on in yourself, even though you are unaware of it. For perhaps you have sometimes fallen sick, and lost flesh, and strength, and beauty; but when you received again from God mercy and healing, you picked up again in flesh and appearance, and recovered also your strength. And as you do not know where your flesh went away and disappeared to, so neither do you know whence it grew, Or whence it came again. But you will say, "From meats and drinks changed into blood." Quite so; but this, too, is the work of God, who thus operates, and not of any other.
Ad Autolycum, 1, 13.