Who said "Truth is often painful, but lies are always poisonous."?

This quote is attributed to Nebula.

Truth is often painful, but lies are always poisonous. - Nebula

"Truth is often painful, but lies are always poisonous."

Nebula Truth

"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."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."