Love God With All Your Mind (Colorado Springs: NavPress, 1997), p. 37
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 teaching 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, and act that primarily involves the will but includes the affection and intellect too.
Taken from http://www.afterall.net/quotes/244
Matthew 22:37 Jesus said to him, ‘You shall love the Lord your God with all your heart, with all your soul, and with all your mind.’ 38 This is the first and great commandment. 39 And the second is like it: ‘You shall love your neighbor as yourself.’ 40 On these two commandments hang all the Law and the Prophets.”
Mere Christianity (New York: Simon and Schuster, 1996) p.125
Now Faith, in the sense in which I am here using the word, is the art of holding on to things your reason has once accepted, in spite of your changing moods. For moods will change, whatever view your reason takes. I know that by experience. Now that I am a Christian I do have moods in which the whole thing looks very improbable: but when I was an atheist I had moods in which Christianity looked terribly probable
Taken from http://www.afterall.net/quotes/34