Article One of the United States Constitution establishes the legislative branch of the federal government, the United States Congress. ... Article One's Vesting Clause grants all federal legislative power to Congress and establishes that Congress consists of the House of Representatives and the Senate.
I think he is just analyzing the experience of tourists visiting two iconic buildings in the city of Amsterdam, Both the Anne Frank House and the Van Gogh Museum.
It's important to stay positive in difficult times because you become happier on the things you accomplished than the things you did not, which triggers you to work harder to finish your goal.