Whether fearlessness is a sin?

❌ Objection 1 : It seems that fearlessness is not a sin. For that which is reckoned to the praise of a just man is not a sin. Now it is written in praise of the just man (Prov. 28:1): "The just, bold as a lion, shall be without dread." Therefore it is not a sin to be without fear.

❌ Objection 2 : Further, nothing is so fearful as death, according to the Philosopher (Ethic. iii, 6). Yet one ought not to fear even death, according to Mt. 10:28, "Fear ye not them that kill the body," etc., nor anything that can be inflicted by man, according to Is. 51:12, "Who art thou, that thou shouldst be afraid of a mortal man?" Therefore it is not a sin to be fearless.

❌ Objection 3 : Further, fear is born of love, as stated above (Question [125], Article [2]). Now it belongs to the perfection of virtue to love nothing earthly, since according to Augustine (De Civ. Dei xiv), "the love of God to the abasement of self makes us citizens of the heavenly city." Therefore it is seemingly not a sin to fear nothing earthly.