Why do the tucks regard enternal life ass both a blessing and curse tuck everlasting?

In "Tuck Everlasting," the Tuck family views eternal life as a blessing because it allows them to experience the world without the fear of death, enjoying endless moments together. However, they also see it as a curse, as it isolates them from the natural cycle of life and death, leading to loneliness and the pain of watching loved ones age and pass away. This duality highlights the complexity of immortality, where the gift of eternal life comes with profound emotional and existential burdens.