Some history of "poisoned cup" before Shakespeare's Hamlet
Today, “poison cup” can be a way to describe having been given a task that may be one’s undoing [1]. But what was the history of “poison cup” in Shakespeare’s time? These are words found in Shakespeare's Macbeth (1.7), but a plot idea used earlier in his Hamlet. "Poisoned cup" is related to "Trojan horse": looks like a gift, but will bring doom. A poisoned cup brought death for Socrates (state-ordered suicide). Scottish reformer John Knox (1514-1572) said that one (Catholic) Mass is worse than a cup of poison in Protestant-Catholic transubstantiation debates, the phrase an example of anti-Catholic polemics. In fact, it's even older: In a legend told by St. Isidore (c. 560 – 636), St. John (of Patmos) the Apostle had an encounter with a poisoned cup of wine, and (miraculously?) survived, perhaps warned of poison by a serpent. In Greek mythology and Hebrew scripture: The rod of Asclepius, associated with healing, features a snake, and Asclepius' daughter H