I’ve always liked the litany against fear from the Dune books:
Litany against fear
The litany against fear is an incantation used by the Bene
Gesserit throughout the series to focus their minds and calm
themselves in times of peril. The litany is as follows:
I must not fear.
Fear is the mind-killer.
Fear is the little-death that brings total
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.