Actions speak louder than words

行动胜于言辞。 一个人说了什么不重要，做了什么才算数。承诺再多，不付诸行动，不过是一阵风。

This proverb has been part of the English language since the 17th century 1, and its logic is timeless: behavior is the only reliable evidence of intent.

Your colleague has been promising for three weeks to finish the team report "by end of this week." Friday comes. Nothing. He says it again Monday. Nothing again.

After a while, the team stops asking him — not because they gave up, but because his repeated promises have lost all credibility. A quieter teammate who delivers a complete draft without fanfare is the one people actually rely on.

The lesson is blunt: what you do consistently is who you are, regardless of what you say you'll do.