Seal of Massachusetts (public domain image on Wikipediia).
Official State Seal of Massachusetts
Adopted in 1885, the Massachusetts state seal displays the coat of arms of the Commonwealth of Massachusetts, surrounded by the words "Sigillum Reipublicae Massachusettensis" (Latin for "Seal of the Republic of Massachusetts"). All State Seals
The blue shield features a native American of the Algonquin nation (in gold) holding a bow in his right hand and an arrow pointing downward in his left (indicating peacefulness). The 5-ponted silver star above his right arm represents Massachusetts as one of the original thirteen states.
The crest above displays a blue and gold braid with an arm grasping a broadsword - a representation of the state's motto (written in gold on a blue ribbon streaming below the native American): "Ense petit placidam sub libertate quietem" (By the sword we seek peace, but peace only under liberty).