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.

Is that an epitaph for Muad Dib of whom we all know and respect.

"He who controls the Spice controls the universe."

Maud Dib; his very name is a weapon.

We've all got the T-shirt.

We Fremen have a saying...
"God created Arrakis to train the faithful."
One cannot go against the word of God.