Who said "The work of the Lord is not done by the weak-hearted."?

This quote is attributed to John Brown.

The work of the Lord is not done by the weak-hearted. - John Brown

"The work of the Lord is not done by the weak-hearted."

John Brown Strength

Abolitionist, Militant American 1800–1859

"I John Brown am now quite certain that the crimes of this guilty land will never be purged away but with blood."

"Let us do our duty."

"The Bible is the word of God and is to be obeyed."

"I am here to lay down my life for the cause of justice."

"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."