Milan Kundera's book "Immortality" suggests that our awareness of aging is often fleeting. He proposes that there are certain moments in life that bring the passage of time into sharp focus. During these instances, we realize our age, contrasting with the times when we feel timeless and unburdened by the concept of aging.

Kundera emphasizes that, for the most part, individuals experience life without a constant focus on their age. This notion implies that our sense of self transcends the physical passage of time, allowing us to embrace moments of vitality and youthfulness amidst the inevitability of aging.