Credo ut intelligam
Credo ut intelligam is Latin for "I believe so that I may understand" and is a maxim of Anselm of Canterbury, which is based on a saying of Augustine of Hippo to relate faith and reason. In Anselm's writing, it is placed in juxtaposition to its converse, intellego ut credam, when he says Neque enim quaero intelligere ut credam, sed credo ut intelligam. It is often associated with Anselm's other famous phrase fides quaerens intellectum.
Augustine understood the saying to mean that we must believe in something in order to know anything about God.
The term has been used pejoratively to describe uncritical acceptance of questionable concepts.