I remember, near the beginning of my daily spiritual practice, during my first attempt to sit in silence for 10 minutes before Morning Prayer, that the truth of this ninth step of humility showed itself to me. From my journal:
Several interactions from the day before came to mind, and I saw them for what they were. I recognized that when I was silent by choice, I had no regrets about the interaction. When I spoke, however, I was very likely to have spoken from the wrong place in myself.
Let no evil talk come out of your mouth, but only what is useful for building up, as there is need, so that your words may give grace to those who hear.