The speaker did not elaborate, but let's think through what he might have meant. The average age in this country continues to rise. People are living longer. There was an article the other day reporting that the number of centenarians is rising. This is a hugely important trend and is the result of a century of social and medical progress and a growing understanding of the role of prayer in our daily lives.
Age suggests maturity.
We cannot run for president unless we are 35. Businesses sometimes won't hire an employee because of age. And age suggests we are subject to more physical problems. Age will be based on mental capacity, not years. In other words, age will not be a factor in our lives.