Caves

The caves in our biblical stories split evenly between being safe access points for other levels of reality and being places to run away from reality. And sometimes caves are both. Avraham buys a cave that is a portal to the next world; Moshe is held in a cave as the Divine Light passes before him; Elijah is confronted in a cave and challenged to understand his own ,mission; Ovadiah shelters 50 prophets in a cave. And Shaul enters a cave to... use the bathroom. What's the pattern?