Donald Whitney explains how silence and solitude are spiritual disciplines in the following 12 minute video.
In part 1, excerpts from Whitney’s book were used to show that spiritual disciplines are necessary to the Christian walk; rather than use long narratives to explain these two disciplines, I think it is easier and more enjoyable to hear him explain them.
If you haven’t heard parts 1 and 2, please check them out, especially part one, as it provides much encouragement and the rationale for learning and using spiritual disciplines to facilitate growth in grace.