Ferengi Rule of Acquisition 285

"No good deed ever goes unpunished."

Source: DS9 episode: The Collaborator

Ferengi Rule of Acquisition 123

"Even a blind man can recognize the glow of Latinum."

Source: The Ferengi Rules of Acquisition (DS9 novel)

Ferengi Rule of Acquisition 30

"A wise man knows that confidentiality equals profit."

Source: The Badlands, Part IV (DS9 novel)

Ferengi Rule of Acquisition 236

"You can't buy fate."

Source: The Ferengi Rules of Acquisition (DS9 reference book)

Ferengi Rule of Acquisition 69

"Ferengi are not responsible for the stupidity of other races."

Source: Balance of Power (TNG novel)

Ferengi Rule of Acquisition 216

"Never gamble with a telepath."

Source: DS9 novel: The Laertian Gamble

Ferengi Rule of Acquisition 242

"More is good...all is better."

Source: The Ferengi Rules of Acquisition (DS9 reference book)

Ferengi Rule of Acquisition 263

"Never let doubt interfere with your lust for Latinum."

Source: DS9 episode: Bar Association

Ferengi Rule of Acquisition 47

"Never trust a man wearing a better suit than your own."

Source: Rivals (DS9 episode)

Ferengi Rule of Acquisition 87

"Learn the customer's weaknesses, so that you can better take advantage of him."

Source: Highest Score (DS9 novel)