He that is our God is the God of salvation; and unto GOD the Lord belong the issues from death. – Psalm 68:20

And last of all He was seen of me also, as of one born out of due time. – 1 Corinthians 15:8

I should like to encourage any very aged person who is still unsaved to drive away altogether the notion that it is too late to seek the Lord. It never is too late so long as life lasts and there is the power to repent of sin and to turn to the Lord. I will not quote cases, but I have a vivid recollection of a good many persons who have been saved at the age of seventy or eighty. We have had persons, past both of those periods, baptized upon profession of their newly found faith. The world’s proverb says, “It is never too late to mend:” ‘but Christ would tell you, if He were here in bodily presence, that it is never too late for Him to mend you, or rather, for Him to make you anew, for that is the work He undertakes to do. It is never too late for Him to stretch out His pierced hand and help the man, who is tottering on his staff, to become a babe in Christ.

Many of you have not yet come of old age, yet, if God should save you, you would be as those who are “born out of due time,” because you are on the very brink of the grave. Consumption has laid its cruel hand upon you and pulled down all your strength. In all probability, you will not be long in this world…O my dear young friend, wherever you may be, it is a sad, sad thing to be carrying about with you your death-warrant, as you certainly are doing, and yet to have no warrant to believe that, when you die, it will be well with you! Oh, I pray you, do not let Satan tempt you with the idea that, now, when sickness is upon you, there is no hope for you! Come to Jesus, however consumptive you look. Come to Jesus, young man, with that chest that scarcely allows you to breathe. Come unto Him, for He will not cast you away. I beseech any of you, who are in a similar condition, do not put off seeking the Lord, but hasten to find Him even now. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2663.cfm