José Saramago said this quote
“ the doves, as we know, must be killed according to the law before Mary’s purification can be acknowledged and ratified. Any ironic or irreverent disciple of Voltaire will find it difficult to resist making the obvious remark that, things being what they are, purity can be maintained only so long as there are innocent creatures to sacrifice in this world, whether turtledoves, lambs, or others. ”