By that, I mean that somehow, for some illogical reason, despite holding that:
- The universe is the product of chance, not necessity or a divine plan
- There is no ultimate meaning behind existence
- Our lives, once we die, are over for ever
- There is no essential difference between man and any other living species whether ape, goat or cabbage - time and undirected genetic mutations link us all together
- Etcetera etcetera...
- Believe it's better to live a "moral" life than an "immoral" one (whatever those terms mean)
- Live a "meaningful" and "purposeful" existence (whatever those terms mean)
- Contribute something "positive" to existence (whatever... you get the idea)
- Live as if man is somehow a "superior" or more "significant" life form (whatever...)
Of course many atheists have been more consistent, and admitted that, starting from the presuppositions of atheism, you can't arrive at a basically Christian view of the world. Some of these atheists have been profoundly depressed by that conclusion; others have argued that we ought to face the facts and ditch the idea that Christianity is a "superior" world-view (such terms having no essential meaning), and instead start building a society based squarely on atheistic ideas.
Very few can go that far though. Most have to try to be content with the inconsistent stopping place of being Christian atheists - and thus continuing to testify to what they know is true, even though they wished it wasn't so.