ἐν πίθῳ τὴν κεραμείαν μανθάνειν → in breaking many pots, the potter learns his craft | of those who undertake the most difficult tasks without learning the elements of the art | don't run before you can walk
stationariness signifies the negation of motion: P. ἡ στάσις ἀπόφασις τοῦ ἰέναι βούλεται εἶναι (Plato Cratylus 426D).