You Know What It Is

It sneaks up
Like a child in the night
To the bed of his mother

It waits to pounce
Like a kitten for a string
Focused and fearless

It invades
Like a sickness
All energy going to feed it

It envelopes
Like a hot bath
Warm and weightless

It awakens
Like a sip of strong coffee
When it touches the tongue

It settles
Like a favorite tune
Well-known and comfortable

And ends
Over and over
Until the one time that it doesn't