Look for a horizon that you can head for. No matter how many stones you might find on your path, never lose sight of the line that divides the sky from the earth. Remember that clouds can’t block out the sun forever, so never let a big objective disappear completely from view. And if at any time you’re unsure about the path you’re following, stop for a moment, lift your head, and look at the horizon. Past geniuses achieved great things because they always had the horizon they were heading for clear in their mind.