Apologetics is to be seen not as a defensive and hostile reaction against the world, but as a welcome opportunity to exhibit, celebrate, and display the treasure chest of the Christian faith, and to explain and commend it to those outside the church. It aims to set out the intellectual, moral, imaginative, and relational richness of the Christian faith—partly to reassure believers and help them develop their faith, but primarily to enable those outside the community of faith to realize the compelling vision that lies at the heart of the Christian gospel.  – Alister McGrath