People wonder about their lifespan too much. I go to the gym and see people obsessed with prolonging their lives. I've watched shows which recommend"health" tips, vitamin supplements, and even mental exercises designed to keep us living longer. I don't mean to be fatalistic or depressing but realize this: nothing we do in the name of health will stop us from dying. At best, we are delaying the inevitable.
Even those who are "taking care of themselves" have no guarantees. Lifelong smokers could live into their 90's and a non-smoker might get lung cancer and pass away. I've certainly seen overweight people live long lives and seen otherwise fit people drop dead of a heart attack in their prime. The only guarantee in life is that we will die and we can't control when or how it happens.
So should we abandon all concern about lifespan and longevity? Common sense would dictate otherwise. What then? Should we decide not to care? Perhaps we should decide to not obsess about it. Perhaps we should live each day aware of our heavenly destinations. Perhaps we should care as much about our spiritual health as our physical health. Perhaps we should decide to focus on living the days we have instead of worrying about how many days there will be. Jesus said in Matthew 6:34, "Give your entire attention to what God is doing right now, and don't get worked up about what may or may not happen tomorrow. God will help you deal with whatever hard things come up when the time comes." (MSG)
Read the Bible in One Year Plan: Numbers 19-20