What you do shows your character better and is more important than what you say. A proverb. John promised to help me, but he didn't. Actions speak louder than words. Joe is very quiet, but actions speak louder than words. He is the best player on the team.
ACTIONS SPEAK LOUDER THAN WORDS
Meaning of ACTIONS SPEAK LOUDER THAN WORDS in English
American idioms English vocabulary. Английский словарь американских идиом. 2012