Faust 's arrangement is that if he is pleased enough with anything the devil gives him that he wants to stay in that moment forever , then he will die in that moment .
Faust 's arrangement is that if during the time while Mephistopheles is serving Faust , Faust is so pleased with anything the devil gives him that he wants to stay in that moment forever , he will die that very moment ( in German he says : `` Verweile doch , du bist so schön '' - `` Stay a while , you are so beautiful '' .