"Passing the Rubicon. When he arrived at the banks of the Rubicon, which divides Cisalpine Gaul from the rest of Italy … he stopped to deliberate…. At last he cried out: "The die is cast" and immediately passed the river."

"Pons Asinorum."

"Present company excepted."

"Quo vadis?"

"Safe bind, safe find."

"So obliging that he ne'er oblig'd."

"Sop to Cerebus."

"That was laid on with a trowel."

"The fat's all in the fire."

"The man that heweth over high, Some chip falleth in his eye."

"The short and the long of it."

"An ounce of discretion is worth a pound of wit."

"Opportunity knocks only once."

"Out of small acorns grow mighty oaks."

"Poets are born, but orators are trained."

"One rotten apple will spoil the whole barrel."

"One murder makes a villain, millions a hero."

"One should fight fire with fire."

"Perfect Planning Prevents Piss Poor Performance. (a.k.a The six P's)"

"Pride comes before the fall. (Pride comes before a fall.)"

"Proverbs run in pairs."

"Put a beggar on horseback and he'll ride to the devil."

"Reality is often stranger than fiction."

"The road to hell is paved with good intentions."

"The rotten apple injures its neighbors."

"Seeing is believing."

"Self trust is the first secret of success."

"Someone who gossips to you will gossip about you."

"Something is better than nothing."

"Stolen fruit is the sweetest."

"Success (only) comes after every necessary precaution."

"That which does not kill you, makes you stronger."

"The dogs bark but the caravan goes on."

"The teacher has not taught, until the student has learned."

"One scabbed sheep mars the whole flock."