0 in Greek mythology (= ancient stories), the wife of the poet Orpheus, whom he tried to save from the underworld (= a place where spirits of the dead go): --
Orpheus loses Eurydice by looking back to see if she is following him out of the underworld.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.