Meaning of the word "it's better to have less thunder in the mouth, and more lightning in the hand" in English

What does "it's better to have less thunder in the mouth, and more lightning in the hand" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

it's better to have less thunder in the mouth, and more lightning in the hand

US /ɪts ˈbetər tu həv les ˈθʌndər ɪn ðə maʊθ, ənd mɔːr ˈlaɪtnɪŋ ɪn ðə hænd/
UK /ɪts ˈbetə tu həv les ˈθʌndə ɪn ðə maʊθ, ənd mɔː ˈlaɪtnɪŋ ɪn ðə hænd/
"it's better to have less thunder in the mouth, and more lightning in the hand" picture

Idiom

it is better to take action and achieve results than to talk loudly or make empty threats

Example:
Instead of just complaining about the problem, remember that it's better to have less thunder in the mouth, and more lightning in the hand.
The coach told the team that it's better to have less thunder in the mouth, and more lightning in the hand during the final match.