“Nothing lasts forever.”

“Nothing can last forever. There isn't any memory, no matter how intense, that doesn't fade out at last.”

“Nothing lasts forever, not even the best machines. And everything can be reused.
- Hephaestus”

“Modern disillusion is unlikely to last forever, and nothing rings so hollow as the angst of yesterday.”

“And you know, these things don't last forever.'

I know, Mandy. Nothing does.'

That's the spirit.”

“Nothing lasts forever, few things even last for long: all are susceptible of decay in one way or another; moreover all that begins also ends.”
Nihil perpetuum, pauca diuturna sunt; aliud alio modo fragile est, rerum exitus variantur, ceterum quicquid coepit et desinit.

“I see only reminders that nothing lasts forever, not even greatness.”
“Some things last.”
I faced him. “Really? And just what would that be?”
“The things that matter.”

“… nothing wonderful lasted forever. Joy was as fleeting as a shooting star that crossed the evening sky, ready to blink out at any moment.”

“I always think everything is going to last forever, but nothing ever does. In fact nothing exists longer than an instant except the thing that we hold in memory”

“The sadness will last forever.”