Who said "Never show vulnerability; it's a sign of weakness."?

This quote is attributed to Marsellus Wallace.

Never show vulnerability; it's a sign of weakness. - Marsellus Wallace

"Never show vulnerability; it's a sign of weakness."

Marsellus Wallace Strength

"I don't give a damn what you know or don't know. What matters is what you do about it."

"A man's word is his bond. Without it, he's nothing."

"Success comes to those who take what they want and hold onto it."

"Fear is the tool of weak men. I don't deal in weakness."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."