The page 48 girder example

'The prosaic steel girder is a mass of electrons whirling around each other at incredible speed. These
tiny bodies are governed by precise laws, and these laws hold true throughout the material world. Science tells us so. We have no reason to doubt it. When, however, the perfectly logical assumption is suggested that underneath the material world and life as we see it, there is an All Powerful, Guiding, Creative Intelligence, right there our perverse streak comes to the surface and we laboriously set out to convince ourselves it isn’t so. We read wordy books and indulge in windy arguments, thinking we  believe this universe needs no God to explain it. Were our contentions true, it would follow that life originated out of nothing, means nothing, and proceeds nowhere.' (Alcoholics Anonymous, pages 48 to 49)

The girder looks solid but isn't, at sub-atomic level. How do you know? Physics tells you. The laws of physics are in charge

The world looked chaotic but isn't, on the spiritual level. How do you know? Spirituality tells you. The laws of spirituality are in charge.

You don't have to understand physics to recognise the authority of the physicist.

You don't have to understand spirituality to recognise the authority of someone successfully living by spiritual principles.