Whether fear is a sin?

Objections

Objection 1 : It seems that fear is not a sin. For fear is a passion, as stated above (FS, Question [23], Article [4]; Question [42]). Now we are neither praised nor blamed for passions, as stated in Ethic. ii. Since then every sin is blameworthy, it seems that fear is not a sin.
Objection 2 : Further, nothing that is commanded in the Divine Law is a sin: since the "law of the Lord is unspotted" (Ps. 18:8). Yet fear is commanded in God's law, for it is written (Eph. 6:5): "Servants, be obedient to them that are your lords according to the flesh, with fear and trembling." Therefore fear is not a sin.
Objection 3 : Further, nothing that is naturally in man is a sin, for sin is contrary to nature according to Damascene (De Fide Orth. iii). Now fear is natural to man: wherefore the Philosopher says (Ethic. iii, 7) that "a man would be insane or insensible to pain, if nothing, not even earthquakes nor deluges, inspired him with fear." Therefore fear is not a sin. .