Suffer with it (sunpascei). Medical term in this sense in Hippocrates and Galen. In N.T only here and Romans 8:17 (of our suffering with Christ). One of Solon's Laws allowed retaliation by any one for another's injuries. Plato (Republic, V, 462) says the body politic "feels the hurt" as the whole body feels a hurt finger. Rejoice with it (suncairei). This is fortunately true also. One may tingle with joy all over the body thanks to the wonderful nervous system and to the relation between mind and matter. See Romans 13:6 for joy of love with truth.