One personal example I experienced recently of accepting resistance occurred when I awoke one morning with intense pain in the back of the heal of my right foot. It was very painful to walk around and I was limping as I went about my business. Then it occurred to me to do the feeling exercise as I got out of my car to walk down a sidewalk. I realized as I focused on it that there was a strong element of fear about the feeling. I was afraid of the pain, of having "an issue", of it possibly becoming worse. I let just focused on the feeling itself, without attaching any language to it and just felt the feeling - without thinking about it - and filling myself with a sense of unconditional love I appreciated the feeling. I felt myself feeling the feeling and appreciating myself for feeling the feeling and feeling unconditional love pouring through me for myself and my feelings.
Within 30 seconds, the intensity of the feeling in my heal diminished and then dissappeared.
My guess about this is that we hold ourselves locked into certain feelings through the fearful, obsessive thoughts that we have around them. When we accept them, we neutralize the fearful thinking and look clearly at the feeling itself, which is then able to release and normalize.