“Duty is the sublimest word in our language. Do your duty in all things. You cannot do more. You should never wish to do less.” -Robert E. Lee

“The soldier who has died due to the failure of his officer is a crime before God. So study hard, young Lieutenant. Prepare yourself well. Burn the midnight oil so that in your old age you will not look down at your hands to find his blood red upon them.”
–Gen. George Patton

"Far better it is to dare mighty things, to win glorious triumphs even though checkered by failure, than to rank with those poor spirits who neither enjoy nor suffer much because they live in the gray twilight that knows neither victory nor defeat."

-Teddy Roosevelt (My father's yearbook quote.)

"Do the right thing. It will gratify some people and astonish the rest." 

-Mark Twain

"Duty, Honor, Country. Those three hallowed words reverently dictate what you ought to be, what you can be, what you will be.

- Gen. Douglas MacAurthur