Prospero to Ariel

Now, Ariel, I am that I am, your late and lonely master,
Who knows now what magic is; --the power to enchant
That comes from disillusion.  What the books can teach one
Is that most desires end up in stinking ponds,
But we have only to learn to sit still and give no orders,
To make you offer us your echo and your mirror;
We have only to believe you, then you dare not lie;
To ask for nothing, and at once from your calm eyes,
With all their lucid proof of apprehension and disorder,
All that we are not stares back at what we are.

(W. H. Auden)