one eternal doesn't mean eternal as man thinks it does in the greek it means age or ages long. and age is like the time you get up till the time you go to bed. From when you where born till the till you go home. from moses to christ etc.
John 3: 16, for God so loved the world he gave his only son that whoever believes in him will never perish.
eternal life, never perish, I think it is obious what eternal means. but just in case.
αἰώνιος, -ον, and (in 2 Th. 2:16; Heb. 9:12; Num. 25:13; Plat. Tim. p. 38 b. [see below]; Diod. i. 1; [cf. WH. App. p. 157; W. 69 (67); B. 26 (23)]) -ος, -α, -ον, (αἰών

;
1. without beginning or end, that which always has been and always will be: θεός, Ro. 16:26, (ὁ μόνος αἰώνιος, 2 Macc. 1:25); πνεῦμα, Heb. 9:14.
2. without beginning: χρόνοις αἰωνίοις, Ro. 16:25; πρὸ χρό νων αἰωνίων, 2 Tim. 1:9; Tit. 1:2; εὐαγγέλιον a gospel whose subject-matter is eternal, i. e. the saving purpose of God adopted from eternity, Rev. 14:6.
3.
without end, never to cease, everlasting:
Thayer, J. H. (1889). A Greek-English lexicon of the New Testament: Being Grimm's Wilke's Clavis Novi Testamenti (20). New York: Harper & Brothers.
ἀπ-όλλυμι and ἀπολλύω ([ἀπολλύει Jn. 12:25 T Tr WH], impv. ἀπόλλυε Ro. 14:15, [cf. B. 45 (39); WH. App. p. 168 sq.]); fut. ἀπολέσω and (1 Co. 1:19 ἀπολῶ fr. a pass. in the O. T., where often) ἀπολῶ (cf. W. 83 (80); [B. 64 (56)]); 1 aor. ἀπώλεσα; to destroy; Mid., pres. ἀπόλλυμαι; [impf. 3 pers. plur. ἀπώλλυντο 1 Co. 10:9 T Tr WH]; fut. ἀπολοῦμαι; 2 aor. ἀπωλόμην; (2 pf. act. ptcp. ἀπολωλώς

; [fr. Hom. down]; to perish.
1. to destroy i. e. to put out of the way entirely, abolish, put an end to, ruin: Mk. 1:24; Lk. 4:34; 17:27, 29; Jude 5; τὴν σοφίαν render useless, cause its emptiness to be perceived, 1 Co. 1:19 (fr. Sept. of Is. 29:14); to kill: Mt. 2:13; 12:14; Mk. 9:22; 11:18; Jn. 10:10, etc.; contextually, to declare that one must be put to death: Mt. 27:20; metaph. to devote or give over to eternal misery: Mt. 10:28; Jas. 4:12; contextually, by one’s conduct to cause another to lose eternal salvation: Ro. 14:15. Mid.
to perish, to be lost, ruined, destroyed;
Thayer, J. H. (1889). A Greek-English lexicon of the New Testament: Being Grimm's Wilke's Clavis Novi Testamenti (64). New York: Harper & Brothers.
so tell me. If we shall not perish, but have eternal life. are they not synonymous with eternal meaning never ending?
john 6 helps also.
35 And Jesus said to them, “I am the bread of life. He who comes to Me shall
never hunger, and he who believes in Me shall never thirst. 36 But I said to you that you have seen Me and yet do not believe. 37
All that the Father gives Me will come to Me, and the one who comes to Me I will by no means cast out. 38 For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 This is the will of the Father who sent Me, t
hat of all He has given Me I should lose nothing, but should raise it up at the last day. 40 And this is the will of Him who sent Me, that everyone who sees the Son and
believes in Him may have everlasting life; and I will raise him up at the last day.”
people can fight it all they want. they can make excuses as to how eternal might not mean eternal. but when God says they will never perish, he will never cast them out, and he will raise then (not have them delivered to him as in the great white judgment) he means it.