Only in silence can you earn big fortune. Quite a wise advice.
Literally:
闷 = low/tightly closed space
声 = sound
才 = only then
能 = can
发 = prosper/produce (only few of the possible meaning for this character)
大 = big
财 = wealth
In deeper meaning, keeping silence can ward envious people from hurting your interest.
Another short concise alternative of this is 'say less, do more'.
要比他们聪明，但不要让他们知道
Literally:
闷 = low/tightly closed space
声 = sound
才 = only then
能 = can
发 = prosper/produce (only few of the possible meaning for this character)
大 = big
财 = wealth
In deeper meaning, keeping silence can ward envious people from hurting your interest.
Another short concise alternative of this is 'say less, do more'.
要比他们聪明，但不要让他们知道
(Yào bǐ tāmen cōngmíng, dàn bùyào ràng tāmen zhīdào)
It is quite similar- 'Be smarter than them, but don't let them know'.