"..., by believing firmly on their abilities ..."

[Odessa Dawn]

To achieve true success and happiness, you must have faith in yourself and your abilities. If you don't have faith in yourself, all your efforts will be half-hearted and you will reach nowhere. People lack faith in themselves because of unknown fear they have developed, by believing firmly on their abilities they can achieve much in their life.
Have more faith in yourself - Quotes, Sayings and Images - myInstaQuotes - Picture Your Thoughts

believe in - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia.

Can the verb believe be followed by the preposition on? My goal of this question is to work out "Verbs and Adjectives Followed by Prepositions".
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[Rover_KE]

It should be 'believe in'.