be a firm believer in (something)

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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.
See also: believer, firm

be a great/firm believer in something

believe strongly that something is good, important or valuable: My mother was a great believer in horoscopes all her life.The boss was a firm believer in developing strong teamwork.
References in periodicals archive ?
Tom is a firm believer in the accreditation program and professional development plan.
Magic is a firm believer in the viability of the Linux operating system," said David Leichner, vice president of worldwide marketing for Magic.
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