"To tell you the truth, the older I get, the less I know. I keep meeting people, both older and younger, who seem to have accrued so much more knowledge or expertise or certainty about who they are and the jobs they do. I just marvel at it."

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Living with doubt ... is almost always more profitable than living with certainty. People don't like doubt, so they pay money and give up opportunities to avoid it. Entrepreneurshi p is largely about living with doubt. If you need reassurance, you're giving up quite a bit to get it. On the other hand, if you can get in the habit of seeking out uncertainty, you'll have developed a great instinct.

— Seth Godin