You are correct that this verse does not mention "eternal damnation"; yet other verses do though. What this verse addresses, is that more people are unredeemed than are redeemed.
HELL - (being defined here as the condition of being under the wrath of God)
ETERNAL -
Mk 9:43
And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched:
Rev 14:10&11
10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
11 And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name.
Revelation 20:10-15
10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
(This is the final judgment of the unredeemed.)
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire. This is the second death.
15 And whosoever was not found written in the book of life was cast into the lake of fire.
Psalm 9:5
Thou hast rebuked the heathen, thou hast destroyed the wicked, thou hast put out their name for ever and ever.
Thanks for your detailed and thoughtful response.
Once again we are dealing with translation bias. But I suppose you could fault me for the same thing. Anyway... here is a translation I prefer for these passages.
The Greek rather than being translated to eternal, is translated to "age" or "ages" or "ages of the ages". Thus a period of time, rather than time without end. Unfortunately, that also applies to eternal life. (life age-during) The question becomes, to what end? Annihilation or restoration? I side with restoration.
Mark 9:43 Young's Literal Translation (YLT)
43 `And if thy hand may cause thee to stumble, cut it off; it is better for thee maimed to enter into the life, than having the two hands, to go away to the gehenna, to the fire
-- the unquenchable --
Revelation 14:10-11 Young's Literal Translation (YLT)
10 he also shall drink of the wine of the wrath of God, that hath been mingled unmixed in the cup of His anger, and he shall be tormented in fire and brimstone before the holy messengers, and before the Lamb,
11 and the smoke of their torment doth go up to
ages of ages; and they have no rest day and night, who are bowing before the beast and his image, also if any doth receive the mark of his name.
Revelation 20:10-15 Young's Literal Translation (YLT)
10 and the Devil, who is leading them astray, was cast into the lake of fire and brimstone, where [are] the beast and the false prophet, and they shall be tormented day and night -- to the
ages of the ages.
11 And I saw a great white throne, and Him who is sitting upon it, from whose face the earth and the heaven did flee away, and place was not found for them;
12 and I saw the dead, small and great, standing before God, and scrolls were opened, and another scroll was opened, which is that of the life, and the dead were judged out of the things written in the scrolls -- according to their works;
13 and the sea did give up those dead in it, and the death and the hades did give up the dead in them, and they were judged, each one according to their works;
14 and the death and the hades were cast to the lake of the fire -- this [is] the second death;
15 and if any one was not found written in the scroll of the life, he was cast to the lake of the fire.
Psalm 9:5 Young's Literal Translation (YLT)
5 Thou hast rebuked nations, Thou hast destroyed the wicked, Their name Thou hast blotted out to
the age and
for ever.