You will be given a text below. Complete the text.
one day , i was sitting right here , formulating a complex equation in my mind . at a certain point , i realized i could have expressed the same thing in a different way , so i adopted this new formula and was about to continue my train of thought , when i suddenly felt with absolute clarity that everything had changed . at first , i did n't understand -- all around me looked the same , the same sun shining on the same
trees