To advertise one’s religious beliefs; to convert (someone) to one’s own faith or religious movement or encourage them to do so.
To coerce into religious conversion.
To advertise a non-religious belief, way of living, cause, point of view, (scientific) hypothesis, social or other position, political party, or other organization; to convince someone to join such a cause or organization or support such a position; to recruit someone.
To persuade someone, gain someone's support, or make someone understand the truth or validity of something.