I have bad days. Sometimes I have a lot of bad days. By and large, I think most people fall into a bad mood because they're able to ruminate on whatever the problem at hand is, and that makes it worse. But when you intercept the rumination process with something that requires your full attention - that's stimulating and absorbing, that places a demand on your intellectual focus - you don't get to ruminate. In a way, it's a mental health aid to be able to do that so much. My routine, what I do, it just feels like home. It's my comfort food.

Our chronic discomfort with ambiguity - which, ironically, is critical to both our creativity and the richness of our lives - leads us to lock down safe, comfortable, familiar interpretations, even if they are only partial representations of or fully disconnected from reality.

Presence is far more intricate and rewarding an art than productivity.

So depending on the day, my schedule is different. But, generally speaking, I get up in the morning, I do a 30 to 45 minute prescheduling of tweets and just seeing if there's anything urgent - do-or-die emails or server outages, stuff like that. Then after that I go to the gym, where I do all my long-form reading - so Instapaper, and all the Kindle books. I go through an embarrassing amount of books per week.

Artist Allen Crawford brings Whitman's undying text to new life in gorgeous hand-lettering and illustrations, transforming the 60-page poem originally published in 1855 as the centerpiece of Leaves of Grass into a breathtaking 256-page piece of art.

Presence is far more intricate and rewarding an art than productivity. Ours is a culture that measures our worth as human beings by our efficiency, our earnings, our ability to perform this or that. The cult of productivity has its place, but worshipping at its altar daily robs us of the very capacity for joy and wonder that makes life worth living.

Leaving love behind is never easy, for it also asks that we leave behind the part of ourselves that did the loving. And yet for all but the very fortunate and the very foolish, this difficult transition is an inevitable part of the human experience, of the ceaseless learning journey that is life - because, after all, anything worth pursuing is worth failing at, and fail we do as we pursue.