God has designed a stunning framework for our period of choosing or rejecting Him.
We dwell in the dimension of time and no moment can be relived in reality. Each day that passes provides numerous opportunities to obey God. Of course, the initial act of obedience must be the accepting of His gift of Salvation - by faith. Then, because of the Indwelling Holy Spirit, there is Power to walk with God in obedience.
Each obedient act and thought leads to an other, Conversely, each choice that moves away from Him leads to more distance and possibly to another and more serious choice.
As we grow older, we realize that the things the world offers are of no eternal significance and that habits and vectors must be corrected. The older one is, the greater the realization that time is short.
The Soldier of The Cross must learn to recover the ground. There may be a sharp tongue. Perhaps there are secret thoughts that are unhealthy. Thoughts against others. Passivity or aggression.
There is no time to waste. On the other hand, the Soldier who brings the matter to the Lord in prayer does not panic about the brevity of life.
The theme must be "Lord, change me."
We are not leaving the best - we are preparing for the best.