The challenge that I am most proud of overcoming is mental clarity/calmness. I think a big part of that is nutrition (getting the right oils), and the rest is continually learning. Its almost as though the worse my body got with chronic illness, the better I became at being me. The challenge went from being unbearable to being enjoyable.
Self-awareness is something that very few people practice. Yet life is but a series of fleeting moments - the enjoyment of which is largely down to how much awareness we practice. This is the most difficult challenge of all and all other challenges ultimately boil down to self-awareness one way or the other. Suffice to say that I am still struggling with this one ...