Who said "Sometimes doing the right thing means standing alone."?

This quote is attributed to X-Men Wolverine.

Sometimes doing the right thing means standing alone. - X-Men Wolverine

"Sometimes doing the right thing means standing alone."

X-Men Wolverine Courage

"I'm the best there is at what I do, but what I do isn't very nice."

"Sometimes it snows in April."

"A man who can't stand to be alone is not a man."

"I've lived a long time, kid. Long enough to know you can't change the past."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."