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.
Whatcha Gonna Do With That Duck?: And Other Provocations, 2006-2012 (ed. Penguin UK, 2013) - ISBN: 9780670923007