# Do not be frightened in any respect

This is a command to the Philippian believers. If your language has a plural command form, use it here. 

# This is a sign to them of their destruction, but of your salvation—and this from God

"Your courage will show them that God will destroy them. It will also show you that God will save you"

# and this from God

"and this is from God." Possible meanings are: 1) the believers' courage or 2) the sign or 3) destruction and salvation.