My grandfather was a preacher.  Do you know any preachers?
I do not know a few! Which religion does he worship?
Preacher
A preacher is a person who delivers sermons or homilies on religious topics to an assembly of people. Less common are preachers who preach on the street, or those whose message is not necessarily religious, but who preach components such as a moral or social worldview or philosophy.
History.
Preachers are common throughout most cultures. They can take the form of a Christian minister on a Sunday morning, or an Islamic Imam. A Muslim preacher in general is referred to as a "dā‘ī", while one
I do not want monument of learning who have passed all your exams with flying colours. I do not want a walking school books. What I want are just manly young men, honest, truthful, clean in habit and thoughts; and I would not break my heart about it if you told me that such or such a fellow writes with difficulty, can’t do compound fraction, or does not know any geometry, if I only knew that he has learnt enough at my school to know the difference between true manliness