not old
Examples
A person is not old until regrets take the place of dreams.
A man is not old as long as he is seeking something.
Is not old wine wholesomest, old pippins toothsomest, old wood burn brightest, old linen wash whitest? Old soldiers, sweethearts, are surest, and old lovers are soundest.
An old woman is not old in a song she dances well.
Young twigs may be bent, but not old trees.
A man is not old until his regrets take the place of his dreams.