When do I grow the most spiritually? Obviously, there are times I feel greatly moved and/or motivated at hearing great speakers. I often experience some growth at those times.
I grow even more when I am in the position of teaching a book of the Bible. It makes me to go deeper than I would otherwise.
My greatest growth, however, has been in times of great stress. During those times I am forced to truly rely on God. It is during those times my faith is strengthened. In my life new levels were reached only after going through difficult times.