(noun) That which one is morally or legally obligated to do. Example: "We don't have a duty to keep you here."
"Let us have faith that right makes might; and in that faith let us, to the end, dare to do our duty as we understand it."
"Men exist for the sake of one another."
"The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first and love of soft living and the get-rich-quick theory of life."
"Great corporations exist only because they are created and safeguarded by our institutions; and it is therefore our right and duty to see that they work in harmony with these institutions."
"There is a love of wild nature in everybody, an ancient mother-love showing itself whether recognized or no, and however covered by cares and duties."
"One painful duty fulfilled makes the next plainer and easier."
"Be with a leader when he is right, stay with him when he is still right, but, leave him when he is wrong."
"When injustice becomes law, resistance becomes duty."
"Human happiness and moral duty are inseparably connected."
"To encourage literature and the arts is a duty which every good citizen owes to his country."
"Love is a better master than duty."
"Where are our Men of abilities? Why do they not come forth to save their Country?"