Practice justice in word and deed, and do not get in the habit of acting thoughtlessly about anything. - Pythagoras

"Ex pede Herculem.

"From his foot, [we can measure] Hercules", is a maxim of proportionality inspired by an experiment attributed to Pythagoras.

In other words, one can extrapolate the whole from the part.

Ex ungue leonem, "from its claw [we can know] the lion," is a similar phrase."

If thou intend to do any good; tarry not till to-morrow! for thou knowest not what may chance thee this night.

Better be mute, than dispute with the Ignorant.