"far more prevalent than winds from astern (if you never violate the Pythagorean maxim)"

 

6th century BC mathematician Pythagoras, according to some sources, encouraged specific dietary rules in his followers, the most famous of which was a rejection of beans.  According to Roman philosopher Cicero, the prohibition was to ensure that the the workings of one's body would not interfere with those of the mind:

 

"for that food produces great flatulence and induces a condition at war with a soul in search for truth"

 

 Online text of Cicero's 'On Divination' (44 BC)