John Wesley (1703-1791) was an English preacher, theologian, and the co-founder of the Methodist movement. Quite popular during his day, Wesley's signature style was to preach outdoors (often in a field) while denouncing Calvinism and encouraging laymen to take roles in spreading the liturgy. Later in life, Wesley was an ardent abolitionist and one of England's most beloved social figures.

"Think not the bigotry of another is any excuse for your own."

-John Wesley, from Sermon 38 "A Caution against Bigotry"

(h/t Wikiquote)