“Things never happen the same way twice.”
“You can never love the same way twice”
“The only permanent rule in Calvinball is that you can never play it the same way twice! (Calvin)”
“All objects in the universe are unique. No two things that happen by chance ever happen in exactly the same way. No two things are ever constructed or manufactured in exactly the same way. No two things wear in exactly the same way. No two things ever break in exactly the same way.”
“We're never the same person twice.”
“Never cry for the same reason twice.”