Throughout church history, theologians have expressed three different aspects of biblical faith: notitia (knowledge), fiducia (trust), and assensus (assent). Notitia refers to the data or doctrinal content of the Christian faith. Assensus denotes the assent of the intellect to the truth of the content of Christian teaching. Note that each of these aspects of faith requires a careful exercise of reason, both in understanding what the teachings of Christianity are and in judging their truthfulness. In this way, reason is indispensable for the third aspect of faith — ducia — which captures the personal application or trust involved in faith, an act that primarily involves the will but includes the affection and intellect too.