Lost Thought

I lost a thought in the middle of the night
It passed right by like a boat with a sail
It went as quiet as a bird in the air
Unconcerned as the shell of a snail.

It surprised me more than a silver fish
As hard to grasp as a snake in a glide
With fangs of a viper half erect
And jaws that opened twice as wide.

It grew like a tree in the middle of my heart
(That's why it gave me such a start)
But blew away like a cloud in a storm
Till my mind, like the day, awoke reborn.