be a great/firm believer in something
(redirected from be a firm believer in something)be a firm believer in (something)
To have a strong conviction that something (stated after "in") is important or worthwhile. I'm a firm believer in resting on the weekends so that I don't get burned out.
be a great believer in (something)
To have a strong conviction that something (stated after "in") is important or worthwhile. I'm a strong believer in resting on the weekends so that I don't get burned out.