So … on Dietrich Bonhoeffer’s authority?
Yes, physicists tell us what they know and the verdict is pretty much in.
The really amazing thing is not that life on Earth is balanced on a knife-edge, but that the entire universe is balanced on a knife-edge, and would be total chaos if any of the natural constants were off even slightly. You see, even if you dismiss man as a chance happening, the fact remains that the universe seems unreasonably suited to the existence of life - almost contrived - you might say a put-up job.
Paul Davies
Astronomy leads us to a unique event, a universe which was created out of nothing, one with the very delicate balance needed to provide exactly the conditions required to permit life, and one which has an underlying (one might say “supernatural”) plan.
– Arno Penzias, Nobel prizewinner
It is easy to see that only a very restricted range of laws of nature are consistent with galaxies and stars, planets, life and intelligence.
– Carl Sagan
Life as we know it would be impossible if any one of several physical quantities had slightly different values.
– Steven Weinberg
In fact a universe like ours with galaxies and stars is actually quite unlikely. If one considers the possible constants and laws that could have emerged, the odds against a universe that has produced life like ours are immense.
Stephen Hawking
The remarkable fact is that the values of these numbers seem to have been very finely adjusted to make possible the development of life.
Stephen Hawking
Nevertheless, it seems clear that there are relatively few ranges of values for the numbers that would allow the development of any form of intelligent life. Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty.
Stephen Hawking
Fine tuning of the universe is hardly a myth except by your authority, which isn’t much.