Doubt is an addiction.
When you are in doubt, you actually avoid responsibility and play the victim card. Doubt often makes you comfortable: you can avoid facts, logic, or any situation that put you in a position that would force you to change your view or belief. So being in doubt can easily become a habit—and get you addicted.
As Suzy Kassem put it, “Doubt kills more dreams than failure ever will.” This is exactly true, but I would add one more: doubt lets us refuse to face reality than fantasy ever will.
Never be addicted to doubt. Or self-doubt. Don’t give power to it; use that power to overcome an addiction.