Scott Galloway is a bestselling author and professor of marketing at NYU Stern. The following is a recent blog post, republished with permission, that originally ran on his blog, "No Mercy / No Malice." In it, Galloway talks about how the grief of losing a loved one reminds us that time marches on with or without us. We put down our dog, Zoe, on Tuesday. We're grieving. Three months ago our vet told us Zoe had growths on her liver, to take her home and enjoy our remaining time with her. Tuesday morning I woke to distressed calls — "Dad … DAD!" — coming from downstairs. Zoe had collapsed a few feet from her bed, had lost control of her bowels, and her breathing was labored.