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 reinforce, to add to, to support (someone or something)
To make strong or stronger; to add strength to; to increase the strength of; to fortify.
To empower; to give moral strength to; to encourage; to enhearten.
To grow strong or stronger.
To substantiate; to corroborate (a belief, argument, etc.)
To augment; to improve; to intensify.