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
tatkräftig, industrius (rastlos tätig). – strenuus. (frisch u. flink im Handeln). – t. Eifer. studium et industria.