What are some well-known short inspirational sayings?

There are many well-known short inspirational sayings, including Walt Disney's "If you can dream it, you can do it," and Theodore Roosevelt's "Believe you can and you're halfway there."

Inspiration is often found in short sayings. Others include Jonathan Swift's wish for others, "May you live every day of your life," the Zen proverb "The obstacle is the path," John F. Kennedy's "If not us, who? If not now, when?", Pablo Picasso's "Everything you can imagine is real," Theodore Roosevelt's "Do what you can, with what you have, where you are," and Norman Vaughn's "Dream big and dare to fail."