Berg, How to answer to an atheist - Jesus' disciple's handbook

In today's debate about religion and Christianity, atheism seems to be dominant. And anyway, at least in Western countries, atheism seems to be the dominant ideology. One reason for this seems to be that Christians, that is, Jesus' disciples, do not know their own matter well. Atheists have many websites to help them in the discussion, where attacks against Christianity are collected, but the greatest help for them is the ignorance of Christians in many matters. Of course, Christians also have...