Who said "Courage is the capacity to act in the face of the unknown."?

This quote is attributed to Buber, Martin.

Courage is the capacity to act in the face of the unknown. - Buber, Martin

"Courage is the capacity to act in the face of the unknown."

Buber, Martin Courage

Philosopher-Theologian Austrian-Jewish 1878–1965

"All real living is meeting."

"The I-Thou relationship is the primary word."

"When two people relate to each other authentically and humanly, God is the electricity that surges between them."

"The world is not comprehensible, but it is embraceable: through embracing, taking into our arms."

"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."