The scene is from Frank Herbert´s Dune...
I must not wait like a smuggler - impatient and jittering, he reminded himself. I must be part of the desert.
Right now I'm not sure about the sandworm´s mouth. It is described in the book as being circular, with a row of crystalline teeth on the rim. But the pointy appendages with double-mouths look so much cooler. And even make more sense to me.
I must not fear.
Fear is the mind-killer.
Fear is the little-death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing.
Only I will remain.