Revelation 21:8
Revelation 21:8 But the fearful, and unbelieving, and abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars,
shall have their part in the lake which burneth with fire and brimstone:
which is the second death.
In Revelation 21:8, a list of the characteristics of those who will not enter heaven begins with the Greek word 'deilois' is translated as cowardly. Why is being fearful or cowardly listed as a sin?