“The substantial conversion of bread and wine into his body and blood introduces within creation the principle of a radical change, a sort of ‘nuclear fission,’ to use an image familiar to us today, which penetrates to the heart of all being, a change meant to set off a process which transforms reality, a process leading ultimately to the transfiguration of the entire world, to the point where God will be all in all (cf. 1 Cor 15:28).”
