One time Eduardo Galeano told next story,

An university student asked to Fernado Birri < What is Utopia for?>

Fernando said <It is a question that every day  I ask to myself, What is Utopia for, if it works for somethig? Because the utopia is on the horizon, therefore I will never reach it. If I walk ten steps, It will move away ten steps. If I walk twenty steps, It will be placed twenty steps over there. So, I know that I will never  reach it. >

....

At the end Fernando said <What is Utopia for? For that, to walk>