Who said "I work not for myself, but for those who come after."?

This quote is attributed to Black Panther.

I work not for myself, but for those who come after. - Black Panther

"I work not for myself, but for those who come after."

Black Panther Work

"The struggles of your people are your struggles."

"Wakanda will no longer hide in the shadows. We will emerge as a leader among nations."

"I am the king of the dead."

"Just because something is strong doesn't mean we can't question it."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."