Sextus Empiricus Pyrrhoniae Hypotyposes 3.10.79

[79] Next let them tell us how much space the moving thing passes through all at once. For if they shall assert that it is limitless, they will be granting that a thing moves through the whole of the earth all at once; while if they shirk this conclusion, let them define for us the extent of the space. But, on the one hand, the attempt to define precisely the space or interval beyond which the thing moving all at once will be unable to advance so much as a hair’s-breadth is probably not merely presumptuous and rash or even ridiculous, but plunges us again into the original difficulty; ¹ for all things will be of equal velocity, if each of them alike has its transitional movements over definite intervals of space.