Plutarch, Aratus
Bernadotte Perrin, Ed.

49. But soon, as the king's fortune flowed smoothly on, he was lifted up by his success, and developed many inordinate desires; his inherent badness, too, forcing aside the unnatural restraints of his assumed deportment and making it swayto the light, little by little laid bare and revealed his true character. In the first place he inflicted a private wrong upon the younger Aratus by corrupting his wife, and was for a long time undetected, since he was a housemate and a guest of the family; in the second place, he began to show hostility towards the civil polities of the Greeks, and it was presently clear that he was trying to shake off Aratus. [2] First grounds of suspicion were afforded by his conduct at Messene. For there was factional strife in the city, and Aratus was tardy in coming to its aid, and Philip, who got to the city a day before Aratus, at once goaded on the two parties against one another. In private he asked the generals of the Messenians if they had not laws to enforce against the common people, and again in private he asked the leaders of the common people if they had not hands to lift against the tyrants. [3] Upon this the officials plucked up courage and tried to lay hands upon the leaders of the people, and they, coming to the attack at the head of their followers, slew the officials and nearly two hundred citizens besides.