Finite Creatures: Mortal loss

At what age did you realize you were not immortal? How did you react to that discovery?

(Thank you for suggesting this prompt, Swoosieque.)

Immortality is for the gods.

Mortality for feeble men  and women.

Mortality strikes,

Whenever someone you love or cherish dies,

A little part of you

Leaves with them too.

—Linus Fernandes.