The only thing we have to fear is fear itself
kitu pekee tunatʃopaswa kuoɡopa ni hofu jeɲewe
In Swahili Kitu pekee tunachopaswa kuogopa ni hofu yenyewe
This is a direct translation of the original quote.
Example
"Wakati wa shida, alikumbusha: 'Kitu pekee tunachopaswa kuogopa ni hofu yenyewe'."