When Alexander the Great rode down to visit Diogenes in his barrel, he offered Diogenes any gift of his choice. With a scowl, Diogenes snapped back his response: "What you've taken away, you can never give me."
"Huh?" said Alex.
"You're standing in my sun."
Diogenes wandered around ancient Greece carrying a lantern and searching for an honest man.
That search still continues.