There's no need to be afraid of any thought, they can't bit if we don't escape them. If we do try to escape instead of letting everything come and go, than it's the problem of the fragmentary perception. Fear and sorrow are not met completely and transcended, only swept under the carpet. From there we always escape, into entertainment, drink, food, violence, activism, nationalism, work, organized religion and hundred other things, which in the end always proves a waste of energy and disappointment in the end. It can't be otherwise, they are only fragments.