Cindy: I am an atheist and actually that statement sounds to me like something a fundamentalist would say. It is saying that there is "something" out there that is dragging one along, a god if you will, to a goal that is unknowable to us humans. Kinda like the saying that "god moves in mysterious ways." Anyway, that is how it sounds to me. That said, I agree that it is not a very helpful/hopeful thought to muse over, but the issue of loss of control is very real to cancer patients, terrifing in fact. For my brother it was and is a big issue. It certainly seems that Cancer takes over your life, whacks your dreams aside & you have to cope with the consequences.
I personally would recommend more positive thoughts, like imaging you can get your hands on the cancer and imaging squeezing it, slowly, firmly, to death. Imagine Harry laughing, 20 years from now, at a family reunions, holding his youngest grandchild, named for him. Hold that thought!