Come, thou shalt bear a letter to him straight

Achilles
Come, thou shalt bear a letter to him straight.
Thersites
Let me bear another to his horse, for that's
the more capable creature.
Achilles
My mind is troubled, like a fountain stirred,
And I myself see not the bottom of it.
Achilles and Patroclus exit.
Thersites
Would the fountain of your mind were clear
again, that I might water an ass at it. I had rather
be a tick in a sheep than such a valiant ignorance.
He exits.