When telegraphs and trains brought in the idea that convenience was more important than content — and speedier means could make up for unimproved ends — Henry David Thoreau reminded us that “the man whose horse trots a mile in a minute does not carry the most important messages.” Even half a century ago, Marshall McLuhan, who came closer than most to seeing what was coming, warned, “When things come at you very fast, naturally you lose touch with yourself.” Thomas Merton struck a chord with millions, by not just noting that “Man was made for the highest activity, which is, in fact, his rest,” but by also acting on it, and stepping out of the rat race and into a Cistercian cloister.Yet few of those voices can be heard these days, precisely because “breaking news” is coming through (perpetually) on CNN and Debbie is just posting images of her summer vacation and the phone is ringing. We barely have enough time to see how little time we have (most Web pages, researchers find, are visited for 10 seconds or less). And the more that floods in on us (the Kardashians, Obamacare, “Dancing with the Stars”), the less of ourselves we have to give to every snippet. All we notice is that the distinctions that used to guide and steady us — between Sunday and Monday, public and private, here and there — are gone.We have more and more ways to communicate, as Thoreau noted, but less and less to say. Partly because we’re so busy communicating. And — as he might also have said — we’re rushing to meet so many deadlines that we hardly register that what we need most are lifelines.