Who said "Sometimes I doubt myself. But I can't show it."?

This quote is attributed to Rick Grimes.

Sometimes I doubt myself. But I can't show it. - Rick Grimes

"Sometimes I doubt myself. But I can't show it."

Rick Grimes Leadership

"We are the walking dead."

"This is not a democracy anymore."

"We don't kill the living."

"I'm not the same man I was before."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"