A person desperate to learn to tread water is in the very state that prevents learning: dependent on something outside of him/herself for safety (treading).
He has to be calm, safe, and comfortable doing nothing in water in order to absorb the many lessons leading up to treading water. And if the teaching is done well, treading will appear naturally and effortlessly out of the blue… and it will last. That’s Miracle Swimming.
When you see someone treading, looking as though they don’t have a care in the world, it’s not because they know how to tread. It’s because they know they are safe, whether they tread or not.