τὸ δ' ἐξαίφνης τὸ ἐν ἀναισθήτῳ χρόνῳ διὰ μικρότητα ἐκστάν → suddenly refers to what has departed from its former condition in a time imperceptible because of its smallness
(see also: ἀνταξιῶ, ἀνταξιόω) claim in return
vicissim requirere, to ask in turn, 6.16.4.
