I thought this was a funny picture in light of the frustrations many Atheists, Agnostics, seekers and Christians have with the issue of faith.
At face value faith is a very problematic idea in light of the many real challenges facing faith in this troublesome world. There is much evidence around us that seems to betray the message that there is a loving God who is unfolding a redemptive plan for this broken world. Sometimes the believing community fails to answer those questions with satisfactory answers and often, there isn't an answer that seems worthy of the questions.
This comic portrayed some of that irony, not to belittle the real need or desire for answers, but we Christians have to laugh at ourselves sometimes too.