The mind tells us that pain is bad and we must resist it and avoid it at all costs. However, in reality, pain is a natural consequence of living. It is sensation in the body, fear in the mind. Our fear of and resistance to pain, both physical and emotional, is what causes much of our suffering. Living consciously means learning to accept, even embrace, pain without resistance.
Soft belly is exactly what it sounds like.
If you wish to experience it, close your eyes and let your body breathe gently and bring all your attention to the belly. Give yourself enough time for the attention to gather there, and then simply allow your belly to soften. You'll probably become aware of some sensations there, in your belly, or in yourheart, or even in your throat or behind your eyes. There is nothing to do with hese sensations, nothing to add to them, nothing to change, just notice them, whatever and wherever they are. Thought may accompany thes sensations.