In this investigation of Christian thinkers, selected philosophers, and other religious leaders, key issues regarding Christianity over the centuries are discussed in detail. Considering the arguments for and against each position, the study's perspective focuses on the key questions of life and existence, showing the different ways Christian thinkers have answered them. Providing an excellent way into understanding these issues and having readers formulate opinions for themselves, the collection of questions include: How can we believe in God when there is so much suffering? Does science mean the end of religion? Does life after death really exist? Have we any good reason to believe in God? What is the ultimate goal of life? and What does it mean to lead a good life?