He didn't feel comfortable moving around, out of his shell, it made him feel vulnerable and exposed. Of course he could always retreat back inside, but it was risky. What if he didn't get back in quickly enough? What if the Kookaburra swooped down and gobbled him for lunch? What if he got too hot and couldn't find a drink? What if, what if, what if......too risky.....not worth the risk!
Oh sure he thought, I might see new things, I might even find a really secure, nurturing spot, under a ledge that is safe, cool and lush. But then again what if, what if, what if?
Where are you being a snail in your life, dragging around the old and familiar? Anxious not to pop out in case you get hurt, in case someone sees you, in case you actually do find something better on the other side and then don't know how to let go......too risky?