That shell is there to protect the seed, but when you soak the seed in water, at some point the membrane breaks and the sprout come out of it.
In the same way, fear is a mechanism around the life to protect it; at the same time, there is a way to go out of it.
If you see, very young kids, they don’t have fear when the mother is taking care of them.
But when a kid starts walking on its own, then he looks around here and there very carefully.
So, fear comes around that time, and it disappears when the mind or the intellect get mature.
A mature intellect has no fear.