Fear throws its voice that it might frustrate our choice once we make it.
We give ourselves most of the warnings that others give us ("Be careful," for example). So much, that by the time we embrace our dream we are careful in ways that cripple. Their reminders reinforce our reluctance. So, we bet timidly and chew bitterly the sour while savoring sweets. We should, of course, be careful but we shouldn't let it cripple. Otherwise we are being foolish instead.