Your Favorite Roman Latin Quotes Maxims Mottos Sayings ?

[Salvianus]

Perhaps one of you might know if there is a latin antecendant to the Mark Twain quote: "They did not know it was impossible, so they did it!"

For some reason I think there is, but can't source it.

There's one from Seneca which is close:

Non quia difficilia sunt, non audemus; sed quid non audemus, difficilia sunt.
(Seneca, Epistuale Morales 104.26)
It is not because things are difficult that we do not dare; but it is because we do not dare that things are difficult.