The other side- Pseudonymous Bosch SPOILER ALERT

In the book I'm reading 'You Have to Stop This' one of the main characters (Cass) has a mission. To discover a secret that her enemies (the Mid Night Sun, a group of scientists who have discovered the secret of eternal living) are also after. When she does, she is in a certain dream portal like state. She encounters an ancient mummy and asks him "Why did the ibis cross the Nile?" she feels as in his answer the secret will be revealed, he answers "To get to the other side of course Hahahahahaahaha!" Cass feels helpless she went all this way to find the secret and nothing, just a lame joke, but that is what she is stuck with.

I feel that she can dig deeper into this secret. The whole point of this secret is life. This secret when plainly looked at is saying "Life is a joke" but really if you dig deeper it says you are this ibis life is the Nile. And the Nile over all is much stronger than the ibis. But the ibis has no choice but to cross it. So as it treads through the water it will encounter some hungry alligators, or some harsh current. But it has to stay strong and not let itself be drowned by the Nile.

Life is a long journey that takes a long time to complete. And it isn't easy, sometimes it feels almost impossible. You just think to yourself wow time goes by so quickly but the years move by so slowly. So saying that the ibis crossed the Nile to get to the other side makes sense. You begin your  life to complete it. And that is what they are saying to the midnight sun you begin your life to complete it not to make it last forever.