You can never be absolutely certain that anything doesn't exist. But you can show that it's unlikely.
Richard DawkinsWhat I can't understand is why you invoke improbability and yet you will not admit that you're shooting yourself in the foot by postulating something just as improbable, magicking into existence the word God.
Richard DawkinsNature is not cruel, only pitilessly indifferent. This is one of the hardest lessons for humans to learn. We cannot admit that things might be neither good nor evil, neither cruel nor kind, but simply callous-indifferent to all suffering, lacking all purpose.
Richard Dawkins