Pain
You can uncover and extinguish all pain except that which hides in your subconscious; you must first locate that. Perhaps your soul is entangled. Naturally, the search is arduous, and it may take time to uncover it. If you persist, you will find it, but some things are better left concealed. Not because they are overwhelming, but because they may trigger the unknown. Certain things should remain buried to avoid awakening what cannot be grasped.