There is a famous quote attributed to then-Cardinal Joseph Ratzinger in 1997, in comments to a Bavarian television station. The future Pope Benedict XVI said the Holy Spirit acted like a good educator in a conclave, allowing cardinals to freely choose a pope without dictating the precise candidate.

If the vote doesn't yield the two-third majority needed to elect the new pope, the cardinals go back to guesthouse Casa Santa Marta for dinner. It is then, on the sidelines of the voting process, that important conversations among the cardinals take place and consensus begins to coalesce around different names.

Cardinals who will take part in the secret conclave to elect a new Catholic pope began checking into two Vatican hotels on Tuesday, where they will be barred from contact with the outside world as they decide who should succeed Pope Francis.