From the first Memorial Day, then called Decoration Day, address in 1868:

I love to believe that no heroic sacrifice is ever lost; that the characters of men are molded and inspired by what their fathers have done; that treasured up in American souls are all the unconscious influences of the great deeds of the Anglo-Saxon race, from Agincourt to Bunker Hill. It was such an influence that led a young Greek, two thousand years ago, when musing on the battle of Marathon, to exclaim, “the trophies of Miltiades will not let me sleep!” Could these men be silent in 1861; these, whose ancestors had felt the inspiration of battle on every field where civilization had fought in the last thousand years? Read their answer in this green turf. Each for himself gathered up the cherished purposes of life—its aims and ambitions, its dearest affections—and flung all, with life itself, into the scale of battle.

And now consider this silent assembly of the dead. What does it represent? Nay, rather, what does it not represent? It is an epitome of the war.

You can read the whole thing here. Remember those who gave their lives. May they rest in peace and rise in glory.
God bless,
LSP