Who said "I'm grateful to still be breathing."?

This quote is attributed to Nebula.

I'm grateful to still be breathing. - Nebula

"I'm grateful to still be breathing."

Nebula Gratitude

"I didn't ask for this life."

"You're welcome."

"I will kill you slowly."

"Gamora may have stolen your money, but I will steal your life."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"