Who said "A person of principle must be willing to stand alone."?

This quote is attributed to Geach, Peter.

A person of principle must be willing to stand alone. - Geach, Peter

"A person of principle must be willing to stand alone."

Geach, Peter Courage

Philosopher British 1916–2013

"Truth is not determined by majority vote."

"A proposition is not the same as a sentence."

"Good English is not a matter of following rules."

"The human mind is not a vessel to be filled, but a fire to be kindled."

"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."