πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip
πρακτόν: τό действие, деяние (τέλος τῶν πρακτῶν Arst.): ποιητὸν καὶ πρακτόν Arst. творчество и деятельность.