You say you believe in your idea. In your people. In your plan. Then run your business that way, and you'll have no regrets. The startup-childbirth analogy ranks among our most overworked business clichés. We talk less about the deathbed vigil that accompanies failure. But as this recent Tumblr post attests, that metaphor is just as apt. Founders watch helplessly as their companies expire, comforting themselves with memories of early promise. Ultimately, though, they descend into recriminations (directed at themselves and others); regret over opportunities squandered; resolutions to do right by survivors; and--above all--personal desolation. Post-mortem, their grieving traces the arc described by Elizabeth Kubler-Ross’s five-stage model. Though perhaps “acceptance” is made easier by the investment community’s lionization of failure.…