According to a 1838 document from the Joseph Smith papers, the motto is:
The Constitution of our country formed by the Fathers of liberty. Peace and good order in society. Love to God, and good will to man. All good and wholesome laws, virtue and truth above all things, and aristarchy, live forever! But woe to tyrants, mobs, aristocracy, anarchy, and toryism, and all those who invent or seek out unrighteous and vexatious law suits, under the pretext and color of law, or office, either religious or political. Exalt the standard of Democracy! Down with that of priestcraft, and let all the people say Amen! that the blood of our fathers may not cry from the ground against us. Sacred is the memory of that blood which bought for us our liberty.
JOSEPH SMITH, JUN.,
THOMAS B. MARSH,
DAVID W. PATTEN,
BRIGHAM YOUNG,
SAMUEL H. SMITH,
GEORGE M. HINKLE,
JOHN CORRILL,
GEORGE W. ROBINSON
(March, 1838).
Note 1: “aristarchy” means “government by good people.”
Note 2: I am unable to find context for this quotation. M* welcomes input from anybody who may provide insights regarding the Church’s motto.