Have you noticed that animals like cats and dogs can always find a place to sleep?   Whether the place is hot or cold,  noisy or quiet,  they can always make themselves comfortable,  eliciting a stoic and unflappable attitude.   Some people may think this is because they don't have much on their minds,  but it can also be because they have true intelligence,  which may at times make them look as though they are not smart.   We really should practice this kind of refinement.