Try this great software PaperQuote
I have been using it for years.
It provides not only with quotes but also have the option to download a different wallpaper daily, with beautiful quote on it.
Plus you can configure 10 different channels on it, and every channel provides you with different wallpaper.
Some of the quotes:
“Dream as if you’ll live forever. Live as if you’ll die today.”
“Without birth and death, and without the perpetual transmutation of all the forms of life, the world would be static, rhythmless, undancing, mummified.”
“Those who stare at the past have their backs turned to the future.”
Download it from http://www.paperquote.com/ 😎