Thinking about the immortality of the crab is a Spanish proverb about daydreaming.

"The deepest problem:

of the immortality of the crab,

of the immortality of the crab,

is that a soul it has,

a little soul in fact …

That if the crab dies

entirely in its totality

with it we all die

for all of eternity."

 - Miguel de Unamuno, ‘The Immortality of the Crab’