Ikkyu, the Zen master, was very clever even as a boy.
Once, he broke his teacher's teacup. Hearing the footsteps of his teacher, he held the pieces of the cup behind him and asked the teacher why did people have to die. The teacher answered that everything has to die and has just so long to live.
Ikkyu, producing the shattered cup, added: “It was time for your cup to die.”