Regragui said: "We must dream. Dreaming is free.

As I sat on the terrace of a café, located on the banks of a peaceful street in the Azhar neighborhood of the suburbs of Casablanca, I sipped my morning coffee while contemplating the incessant ballet of vehicles gradually invading the streets.

Suddenly, a terrible sight caught my eye: a van made a lightning-fast swerve and struck a poor motorcyclist head-on, who was immediately swallowed up by the wheels of the vehicle. The driver was thrown far onto the sidewalk, where he lay, motionless. The people present in the café rushed to the scene, yelling "La hawla wala kowata illa billah" (There is no power or strength except with Allah).

The scene playing out before my eyes was both sad and upsetting, making me wonder how things could have taken a different turn if the victim had the ability to go back in time and change a small detail that would have changed everything.

This thought led me to consider different theories about time travel, such as the Visitors by Jean-Marie Poiré, where Godefroy de Montmirail, by mistake, kills his future father-in-law, preventing his marriage with Frénégonde.

There is also Novikov's principle of consistency, which holds that when people can travel in the past, the future they leave behind cannot be changed, and the actions they take in the past are already part of history. It is thus impossible to get rid of a bloodthirsty dictator when he is still a child, as even if he is replaced by another child, he will also become a dictator.

Finally, there is the multiple world hypothesis, which holds that in a parallel universe, the traveler can do virtually anything, as only the new timeline will be affected. It is thus possible to kill all of one's ancestors in this parallel universe, without creating a paradox, but simply a new story where the traveler never existed.

All these theories of time travel made my mind swirl, losing me in my thoughts and disconnecting me from the present moment. Then, the ambulance's siren and the crowd's cries brought me back to reality. I stayed there, motionless, lost in my thoughts, contemplating the chaos around me, the images of the accident still resonating in my mind, haunting me like a ghost of the past.

But I realized that these theories of time travel are nothing more than vain speculations, as the past is immutable and it is pointless to cling to it. It is time to focus on the present and build a better future.

I then got up from my chair, paid for my coffee, and left in the direction of my destiny, determined not to be a prisoner of my regrets anymore, but to learn from them.