What's your favorite postcard you have ever received?

The postcard I received may be nothing to others. There are no clouds and no sea. The list of three equations was sent by very important people. I am a liberal arts student. I am usually emotional and easily influenced by the stories of the people in the play, so I prefer the kind of "logical sum 1 is 1, and 2 is 2" in science and engineering. The dream school is the answer to the equation on the cover of the postcard of "The ceiling for science and engineering students-MIT", which coincides with my heart. This feeling of knowing your own preferences, keeping them in mind and trying to cater to them is beautiful.