LIVY

Now the Athenians had undertaken the war against Philip for no sufficient reason, since they retained nothing of their ancient greatness except their spirit. Two young men from Acarnania, during the celebration of the mysteries at Eleusis, though not initiated, had entered the temple of Ceres, ignorant that they were committing sacrilege, and merely following the crowd. Their words easily betrayed them, since they asked foolish questions, and though it was clear that they had come in openly and by mistake they were put to death as if they had committed some heinous crime. The Acarnanians reported this revolting and unfriendly act to Philip, and prevailed upon him to send them Macedonian aid and permit them to attack Athens.  (Livy XXI, xiv, 6-10)