As an adult, returning to the Catholic faith, I grew excited to learn about Biblical typology. A "type" is an element of the Old Testament: a person, thing, or event, which foreshadows something in the New Testament. The Fisheaters website has a nice article on it.
*"New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved."