S. Teresa of Jesus: "do not be afraid"

of those who kill the body
but after that can do no more.
I shall show you whom to fear.
Be afraid of the one who after killing
has the power to cast into Gehenna ...

-- Lk 12:1-7

Faith
It means trusting God in every circumstance, even in adversity. A prayer of St. Teresa of Jesus wonderfully expresses this trust:

Let nothing trouble you / Let nothing frighten you
Everything passes / God never changes
Patience / Obtains all
Whoever has God / Wants for nothing
God alone is enough.

-- CCC 227