“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)”
“Things never happen the same way twice.”
“There are all kinds of love in this world but never the same love twice.”
“You can never make the same mistake twice because the second time you make it, it's not a mistake, it's a choice.”
“The same river can never be crossed twice. The flowing water has no memory of footprints.”