Old age should be the greatest time of life! If you've filled your days with love and lived a good life and accomplished something for the Lord, it's a time that you can see the good fruit of your labours!--And that helps make it the best time of your life!
It's really sad how so many people view the older age as a terrible age, when really things are just getting better the older you get! Old age only becomes a disappointment if we find ourselves to be growing years older without growing years closer to God. That's like walking in a circle; it's motion without progress! But God didn't give us the gift of life intending the first half to be the best! What God begins He completes. (Psa.138:8) God will finish what He has begun! So neither fear old age nor fight it, but take hold of this stage of life and make something beautiful out of it.