While united as a body, our passage says there is diversity, by nature of the different gifts that we have all been given. Our gifts are to be used. They maintain unity and it is part of our calling to use them. We also recognise that we need to be built up and grow to maturity as we benefit from those given gifts in the teaching and preaching fo the word of God. Being built up, growing to maturity and using our gifts are not optional, but in fact all part of our calling.