Quote by Ulysses S. Grant
"Perseverance is the hard work you do after you get tired of doing the hard work you already did."
More from Ulysses S. Grant
"The art of war is simple enough. Find out where your enemy is. Get at him as soon as you can. Strike him as hard as you can, and keep moving on."
"I know only two tunes: one of them is Yankee Doodle and the other isn't."
"I have never advocated war except as a means of peace."
"Leave nothing for to-morrow which can be done to-day."