What Mac Sledge meant is that he doesn’t trust those the all-too-brief periods when happiness or, if you will, temporary euphoria or at least the absence of even the slightest melancholia…when those good vibes arrive and seem to light up everything and soothe all those souls. I’ve always preferred Hank Worden‘s line in Red River: “I don’t like it when things are goin’ too good and I don’t like it when things are goin’ too bad. I like ’em in between.”