LOL on your Descartes story, Rivka!
Does phrases like "it's raining cats and dogs" also fit?
"Eternity's a long time, especially in the end"
"Mocking philosophy *is* really philosophing!" (Pascal)
"ein, zwei policei, drei, vier brigadier ..." (Oops, (just kidding <g>)
"There's no smoke without fire"
"The sun always shines on tv"
"One, two: buckle my shoe..."
"Every road leads to Rome" (er...not sure of the translation)