A redated post. Barrow's essay is here.
Cambridge mathematician finds God in astronomy. I think there are overtones of the argument from reason in this discussion, such as the following:
There are some who say that because we use our minds to appreciate the order and complexity of the Universe around us, there is nothing more to that order than what is imposed by the human mind. That is a serious misjudgment.
Were it true, then we would expect to find our greatest and most reliable understanding of the world in the everyday events for which millions of years of natural selection have sharpened our wits and prepared our senses. And when we look towards the outer space of galaxies and black holes, or into the inner space of quarks and electrons, we should expect to find few resonances between our minds and the ways of these worlds. Natural selection requires no understanding of quarks and black holes for our survival and multiplication.
And yet, we find these expectations turned upon their heads. The most precise and reliable knowledge we have about anything in the Universe is of events in a binary star system more than 3,000 light years from our planet and in the sub-atomic world of electrons and light rays, where we are accurate to better than nine decimal places.
And curiously, our greatest uncertainties all relate to the local problems of understanding ourselves - human societies, human behaviour, and human minds - all the things that really matter for human survival.