In 1 Samuel 17, we read the story of David—young, inexperienced and seemingly ill-equipped—standing before a huge giant, Goliath. Beginning the process of changing the culture of your parish can also feel like taking on a giant. There are two possible attitudes when facing a giant. One is to say, ‘It’s too big. There’s nothing I can do.’ The other is to say, ‘It’s so big I can’t miss!’ The five-systems framework outlined here is a great way to make an effective start on the ‘giant’ of growing a more missionary and fruitful parish.