What do cats remember of days?

What do cats remember of days?
They remember the ways in from the cold,
The warmest spot, the place of food.
They remember the places of pain, their enemies,
the irritation of birds, the warm fumes of the soil,
the usefulness of dust.
They remember the creak of a bed, the sound
of their owner´s footsteps,
the taste of fish, the loveliness of cream.
Cats remember what is essential of days.
Letting all other memories go as of no worth
they sleep sounder than we,
whose hearts break remembering so many
inessential things.

Thanks to son Gwyn for drawing my attention to this poem 'Inessential Things' by Brian Patten.