How is it possible to go about undoing what your lower self has manifested in the way of physical illness? How can you undo it?
In the first place, my dear friend, you should not try to think to wish to eliminate the consequences first. That would be too easy. In other words, if your lower self has created an illness, this illness has to be accepted first. And you should rather go about finding the roots of what part of your lower self has created this illness. Thus the lower self really has to be met and completely explored.
Your aim must be purification and perfection for its own sake, for the love to God you have in you, and not for the sake of not having to bear a discomfort. It is true that it takes a lot of overcoming and inner fight to purify the motives first, to such an extent. But that is the necessary foundation. And while this is done, a lot of other things are learned automatically, and thus spiritual strength gathers by learning to apply absolute self-honesty. Once your motives are pure, the sickness will not matter half as much anymore to you as the state of your soul. And in the measure that the ego, the comfort, and everything that goes with it loses in importance to you, you will have followed a very important spiritual law, and thus health will be gradually restored. This law is the giving up of the self, the life Jesus mentioned. Thus you will win it, but only thus.
So, begin by meeting your lower self, in courage, in optimism, in humility, and in a spirit of warfare, if I may use this expression. And once you discover it, once you shed all the masks and all the coatings, then you begin to work on these different aspects of the lower self. You do this by daily observation and self-testing, by observing again and again how far your inner currents still deviate from what you wish them to be. As you do that, as you become master over your lower self, as you learn real self-honesty, as your motives for development become purer and purer, your vision will widen, enlightenment will be given to you, and gradually your illness will disappear. So you should not even think of your illness first, but of the root of the problem. That will be the only lasting success, the only one, my dear! If your wish is recognized in the spirit world, if your wish is truly sincere that you want to purify yourself and not merely get rid of unpleasant consequences that are most visible or noticeable to you help will be extended to you, guidance will come to you so that you can go to battle with your lower self with help, because no one can really do it alone.