Many Jewish sages have noted that the two Hebrew words emunah (faith) and emun (training) are derived from the same root, and they have interpreted this as showing that the soul must train itself in order to be capable of achieving meaningful religious experience.
This need for training, however, does not mean that there is no place for spontaneous religious experience, but rather that such spontaneous experience by itself cannot serve as the basis of the religious life.
Only by cultivating awareness and understanding, by conscious, ongoing preparation can a person draw from the inner resources in his soul the capacity for meaningful and profound experience.
–Rabbi Adin Steinsaltz
From The Strife of the Spirit by Rabbi Adin Steinsaltz