Bede — on Rom 8:25 (Homilies on the Gospels 11.14)

“The certainty of our hope is prefigured by the egg. No offspring is as yet discernible in the egg, but the birth of the bird to come is hoped for. The faithful do not yet look upon the glory of the fatherland on high in which they believe at the present time, but they await its coming in hope.”