He spoke so convincingly that you couldn't help believing him.

他说得有根有梢的，不由得你不信。

《新英汉大辞典》

Tom fooled a lot of people into believing him.

汤姆骗得很多人相信他。

youdao

He cheated her into believing him a wealthy man.

他骗得她相信他是一个富翁。

youdao

But the BJP,after some initial waffling, is backing Gandhi, apparently believing the controversy surrounding him and his alleged remarks will strike a positive chord with some Hindus.

VOA: standard.2009.03.28

He recognized the genius of Rupert Murdoch, while many others felt only disdain for him (and still do), believing him to be a predatory parvenu out to destroy "quality" journalism.

FORBES: Magazine Article

At first, several members of the public went to help him believing he had been hit by a car as he lay in the road.

BBC: Samuel Guidera murder: Police video posted on YouTube

It's not a matter of him believing he was guilty.

CNN: Juror says key witnesses lacked credibility