Each of us will have a last second. At some point that second hand will jump and it will be the last time, in this life, that we will experience a second.
In Psalm 90:12, the psalmist tells us that we are to number our days. To calculate how long we have to serve the Lord here. We are to do that so that we can present to Him a heart of wisdom. I take that, like we are told in the parable of the rich man and Christ’s explanation in Luke 12:16 – 32, that we are to place our relationship and service to Him as first place in our lives. We are to arrange our lives to maximize our impact for Him. In the past I have had conversations with people who say that they are going to give Him the second half. Become significant after they have become successful. I am not sure that there is anything wrong with that, I have suspicions but not sure.
I am pretty sure, based on what Christ shared in Luke 12:16 - 32, I am not going to know how long that last half will be. I am sure I will not know when the last second is.