Fortitude
is,
Strength of Mind.
.

Fortitude is
that strength of mind or soul
which enables a person to be
patient and long-suffering,
kind and courageous,
faithful and just.

Be strong and of good courage,
fear not, nor be afraid of them:
for the Lord thy God,
He it is that doth go with thee;
He will not fail thee nor forsake thee.
Deuteronomy 31:6

For God hath not given us
the spirit of fear;
but of power, and of love,
and of a sound mind.
II Timothy
1:7