Final answer:
The official seal of the Massachusetts Bay Colony represented the religious mission to convert and dominate over the indigenous population, in line with the Puritanical aims under Governor John Winthrop.
Step-by-step explanation:
The overall message of the official seal of the Massachusetts Bay Colony was one of religious mission and English settler dominion. Portraying a Native American with the plea, "Come over and help us," the seal reflects the religious ambitions of John Winthrop, the colony's first governor. It symbolizes the Puritans' intent to spread their religious beliefs to the indigenous people, consistent with the charter of the Massachusetts Bay Company, which stated the purpose was "to win and incite the natives of this country, to the knowledge and obedience of the only true God and Saviour of mankind." This endeavor connected to broader European colonial efforts, where conversion and subjugation often went hand in hand.