She lived for one hundred and twenty seven years. Sarah took the beauty of childhood with her into womanhood, and the innocence of the twenty year old girl with her into the grave. Look how different the point of view of our Sages is compared to the opinion of the average man today. The Sages look for beauty not of the twenty year old, but of the child, and innocence not of the child but of the mature woman. The beauty of the child is pure and the one who admires her is unbiased by his passions.
Innocence assumes the possibility of guilt.
To be not guilty implies that one had a struggle against one's passions and has conquered them. Only a girl matured to womanhood and the boy matured to manhood can wear the crown of innocence. These ideas are indeed powerful. We must enjoy the pure beauty of things independent of our desires. Imagine driving your car on the highway on an autumn day.