Have you heard the parable of the fish who found the sea?

So once upon a time, there was an ordinary fish who lived in the great sea, not being aware he was in it. He believed that he swam up and down and around in an empty space all by himself which he thought was very clever of him.

But One day he started overthinking “What if he forgets how to swim and falls down into the abyss of the great sea? At that moment, all his skill of swimming had left him and he began to fall. In the midst of the fall, he realised there is only one way of saving himself to grab hold of his own tail with his mouth and hold himself up.