Wiktionary
vb. (present participle of believe in English)
Usage examples of "believing in".
I have, believing in an infallible success, drawn Porthos into my conspiracy.
He had evolved from dust, and to dust he would return, when Ivy grew up and stopped believing in him.
The broken-glass grating of boots on the frozen gravel made Cadfael turn from his mortar, knowing the step but hardly believing in it.
He knew full well that his people could be very barbaric indeed, when it came to believing in magic.
I mean I stopped believing in Santa Clause when I was six, the other big guy with the long white beard just took a little longer.
The day he gave up believing in Santa Claus he began believing in the Cincinnati Kid.
If you truly know what I am thinking, Deanna Troi, then you are aware that I believe you are having trouble believing in your mother's intelligence.
If you truly know what I am thinking, Deanna Troi, then you are aware that I believe you are having trouble believing in your mother’.