There are moments when a single detail reveals more than a whole biography. Donald Trump unveiled a new, special design for the American passport featuring his own face - issued to mark the country's 250th anniversary. In the image, his portrait stands above the presidential desk, with the text of the Declaration of Independence in the background and his signature below. Modesty was clearly not part of the design brief.

But it wasn't the image that drew the mockery - it was the message he announced it with: "Welcome, but be good!" Harmless at first glance - until you remember what a passport actually is. It's a document issued to American citizens when they travel abroad, allowing them to return to their own country. In other words, Trump is telling his own fellow citizens to "be good" when they come home - a sentence that sounds like a border warning for newcomers, not for locals.

Social media didn't forgive it. Users wondered whether the president even understands what a passport is for, and the phrase quickly became the subject of countless jokes. A small thing, seemingly - but a small thing that reveals how someone sees their own role: not as a servant of the citizens, but as a gatekeeper deciding who is "good" enough to enter.

For us in the Balkans, who have a complicated relationship with passports - visa regimes, queues outside embassies, waiting to prove we're "good" travelers - this scene has a bitter ring. When the leader of the most powerful country turns his own document into a personal billboard with a warning, the question isn't whether it's vanity. The question is why those who confuse the top with a mirror so often end up at the top.