Each spiritual crisis has its own causes and remedies.
It is important to remember in every case, however, that such crises are part of the process of religious life, not a negation of it.
This process entails making one's way from stage to stage, laboring at every point to reshape one's inner life.
Each upward movement entails a disruption of equilibrium—a jarring experience, to be sure, but a necessary part of the process.
And the loftier and farther-reaching the aspiration, the greater the possibility of collision and breakage along the way.
–Rabbi Adin Steinsaltz
From Teshuvah, p. 36, by Rabbi Adin Steinsaltz