\'Buck up.\' \'Stop feeling sorry for yourself.\' \'Don\'t ruin everything.\' When you are anxious, sad, angry, or lonely, do you hear this self-critical voice? What would happen if, instead of fighting diff.... \'Buck up.\' \'Stop feeling sorry for yourself.\' \'Don\'t ruin everything.\' When you are anxious, sad, angry, or lonely, do you hear this self-critical voice? What would happen if, instead of fighting diff...