It snowed last night and this morning. Now the sun’s come out, turning my lawn and flowerbeds to drifts of cold, cold diamonds. That means my neighbor Sam will be along shortly to clean off my sidewalks with his snow blower. Why? Because I pay him? I don’t. Because I ask him? I don’t. No, because he loves to do it. There are times when we give up our own much-needed time, energy and opportunities to tend to another’s welfare. And sometimes that sacrificial giving is