As Christians we must understand that there is no word so meaningless as the word ‘god’ until it is defined. No word has been used to teach absolutely opposite concepts as much as the word ‘god’. Consequently, let us not be confused. There is much ‘spirituality’ about us today that would relate itself to the word god or to the idea god; but this is not what we are talking about. Biblical truth and spirituality is not a relationship to the word god, or to the idea god. It is a relationship to the one who is there, which is an entirely different concept.
— Francis Schaeffer, from The God Who Is There, p. 146