If you wish to fear nothing, consider that everything is to be feared.
The only person who fears nothing is one who has nothing to lose.
Did you ever hear the Oriental proverb, "The dogs bark but the caravan passes on"? Let them bark, Scarlett. I fear nothing will stop your caravan.
A clear and innocent conscience fears nothing.
Who knows nothing base, Fears nothing known.
If you banish fear, nothing terribly bad can happen to you.