I think that Brunelleschi was brave building a dome without imagining what would happen. Others thought he was just simply mad to make a dome on a tall building. Everyone thought that they were pretty sure that the dome would topple over and crumble down as soon as it was built, or maybe even before that! He wasn't pretty sure if the dome would stand, for it wasn't just like an egg. He didn't have much confidence but looked on the bright side of the situation and tried it, even if it might have been a failure. Cosimo's deep friendship with Brunelleschi worked out well and Cosimo probably thought it was a great thing to patronize Brunelleschi or I wouldn't have such a great friend nor any money.
