Authors:

Posterity! You will never know how much it cost the present generation to preserve your freedom! I hope you will make a good use of it.

Abigail Adams, John Adams, L. H. Butterfield, Marc Friedlaender, Mary-Jo Kline (1975). “The Book of Abigail and John: Selected Letters of the Adams Family, 1762-1784”, p.173, UPNE
Posterity! You will never know how much it cost the present generation to preserve your freedom! I hope you will make a good use of it.