I believe his words, but do not take it seriously.

胣相信他说的话，但不要当真。

youdao

I believe his words, as a matter of fact I don't believe in him.

我相信他的话，但实际上我并不相信他的为人。

youdao

I didn't believe his words.

我不相信他的话。

youdao

I had made him believe that I had taken his words literally.

除非不要威严。

耶鲁公开课 - 1945年后的美国小说课程节选

We can play Reverend Wright's sermons on every channel, every day and talk about them from now until the election, and make the only question in this campaign whether or not the American people think that I somehow believe or sympathize with his most offensive words.

NPR: Obama Forced to Address Relationship with Pastor

And I am very clear, crystal clear, when I believe that his policies have been falsely represented, as is the case here or when his words have been completely mischaracterized.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,