Who said "Strength is not the absence of doubt"?

This quote is attributed to Goldman, Alvin.

Strength is not the absence of doubt - Goldman, Alvin

"Strength is not the absence of doubt"

Goldman, Alvin Strength

Philosopher American Born 1938 (age 88)

"Justified true belief is not knowledge"

"The mind is the greatest tool we possess"

"Truth is the foundation of all virtue"

"Knowledge without application is merely information"

"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."