God’s desire that you be in health (3 John 2). I do not see an age limit in the verse. As long as you are on this earth, God wants you well. “By whose stripes you were healed” is true whatever your age! Therefore, you do not have to be afflicted with the diseases that often come on older people. You are still redeemed from every sickness, and you can still flourish.
Those that be planted in the house of the LORD shall flourish in the courts of our God.
They shall still bring forth fruit in old age; they shall be fat and flourishing.
It is the devil’s lie that you have to become senile and decrepit when you get old.
God says that you can flourish in old age.
Moses lived to be 120, yet “his eye was not dim, nor his natural force abated” (Deuteronomy 34:7)
Caleb was still slaying giants in his eighties.
But aren’re we mortal after all? Mustn’t we all die, unless we happen to be on earth at the time of the Rapture (if we are born again, we shall not die but be taken up into the mid-point in the sky at the call of Jesus).
Important point: A born again believer does not have to get sick to die.
You can choose to go home to be with the Lord when you are satisfied. Psalm 90:16
Paul said that he had a choice to depart and be with Christ or to stay on the earth, which was more needful for the people. It was Paul’s choice, not the devil’s choice through sickness.
Until you’re ready to go home to your eternal reward, healing belongs to you, so believe God and stay healthy!
For more on this topic, see the answer to the Objection: If you could always get healed, you would live forever, and God says you won’t.