In Illusions, Bach uses the analogy of creatures clinging to the rocks in a swift stream. The one lets go, goes with the stream and leaves the "clinging life" behind, supposedly for some higher calling.
What he only hints at is the terrible loneliness of the one who travels with the river.
When you cling, you are with fellow clingers. When you soar, you do it alone - now and then seeing someone who is only holding on with one hand, or is in an eddy above or below. Before you can spend time with them, you are swept onward - to what?
Richard Bach: Illusions; The Adventures of a Reluctant Messiah, copyright 1977 by Creatures Enterprises, Inc.