This was the passage I was looking for:
Augustine of Hippo: Faith Seeking Understanding: In his Sermon (43.7, 9) Augustine asserted: Crede, ut intelligas (“Believe in order that you may understand”).12 For Augustine, faith (“trust in a reliable source”) is an indispensable element in knowledge. One must believe in something in order to know anything. Knowledge begins with faith and faith provides a foundation for knowledge. Faith is itself indirect knowledge (like testimony or authority). While faith comes first in time, knowledge comes first in importance. Faith and reason do not conflict, but instead complement one another. Augustine believed that while reason does not cause faith, reason everywhere supports faith. Augustine also argued that Christians should seek to use their reason to understand doctrines (the Trinity, Incarnation, etc.) that are given via divine revelation (thus “faith seeking understanding”). Augustine’s writings about the role of faith influenced Credo, ut intelligam (“I believe in order that I might understand”) by St. Anselm (a.d. 1033-1109).
I believe my cousin wants the knowledge without the leap of faith first.