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Agnostic • Infidel • Unbeliever • Unbelievers
The International Standard Bible Encyclopedia, Revised
Unbelief [Gk. apistía]; NEB also WANT OF FAITH, INCREDULITY, FAITHLESS, etc.; UNBELIEVER; UNBELIEVING [Gk. ápistos (1 Cor. 6:6; 7:12–15; 14:24; 2 Cor. 4:4; 6:14f.; etc.), part of apeithéō (Acts 14:2; Rom. 15:31), apistía (He. 3:12)]; AV also THAT BELIEVETH NOT, INFIDEL; NEB also UNCONVERTED, HEATHEN
InfidelThe AV uses this word twice to translate Gk. ápistos, “unbelieving”: “What part hath he that believeth with an infidel?” (2 Cor. 6:15); “If any provide not for his own, [he] … is worse than an infidel” (1 Tim. 5:8). In both passages the RSV has “unbeliever” in harmony with numerous other instances
The HarperCollins Bible Dictionary (Revised and Updated)
unbeliever, in the nrsv a term used only in Paul’s letters, with reference to people who are not part of the Christian community. The word appears a dozen times in Paul’s letters to the Corinthians (cf. 1 Cor. 6:6; 7:12–15; 10:27; 14:22–24; 2 Cor. 4:4; 6:14–15) in addition to a single occurrence in 1
The New Bible Dictionary, Third Edition
UNBELIEF. Expressed by two Gk. words in the NT, apistia and apeitheia. According to MM, the word apeitheia, together with apeitheō and apeithēs, ‘connotes invariably disobedience, rebellion, contumacy’. So Paul says that the Gentiles have obtained mercy through the rebellion of the Jews (Rom. 11:30).
The Oxford Dictionary of the Christian Church
infidel. A person who has a positive disbelief in every form of the Christian faith. In medieval times the word (Lat. infidelis) was employed esp. of the Muslims, and also, though less often, of Jews and pagans; but the distinction ‘Jews, Turks, Infidels, and Hereticks’ in the third *Good Friday *collect
Harper’s Bible Dictionary
Unbelieverunbeliever, a term found almost exclusively in the Letters of Paul, where it apparently denotes any person who is not a member of the Christian community (cf. 1 Cor. 6:6; 7:12–15; 10:27; 14:22–24; 2 Cor. 4:4; 6:14–15; also Rom. 15:31, where a different Greek word is thus translated). See
Nelson’s New Illustrated Bible Dictionary
UNBELIEF — lack of belief or faith in God and His provision. While unbelief does not hinder God’s faithfulness (Rom. 3:3), it does affect the individual’s capacity to receive the benefits of that faithfulness. The unbelief of many Israelites, for example, kept them from seeing the Promised Land (Heb.
International Standard Bible Encyclopedia
UNBELIEF<un-be-lef’>: The word (the King James Version) represents two Greek words, [ἀπείθεια, apeitheia], “disobedience” (only in Rom 11:30, 32; Heb 4:6, 11), and [ἀπιστία, apistia], “distrust,” the antithesis to “faith”. (which see). The two words are not only akin etymologically
INFIDEL<in’-fi-del> ([ἄπιστος, apistos], “unbelieving,” “incredulous”): the King James Version has this word twice: “What part hath he that believeth with an infidel?” (2 Cor 6:15); “If any provide not for his own, .... is worse than an infidel” (1 Tim 5:8). In both passages the English
UNBELIEVER<un-be-lev’-er>: This word follows closely the lines of “ unbelief” (which see) in its relation to originals. Once only (Acts 14:2) it represents the participle [ἀπειθου̂ντες, apeithountes], “disobeying (ones).” Elsewhere (nine cases) it represents [ἄπιστος, apistos], “faithless,”
A Catholic Dictionary
infidel. One who is not among the fideles, the faithful of Christ. Popularly, the term is applied to all who reject Christianity as a divine revelation. In order to reject it, they must have heard of it; those, therefore, who have never heard of Christianity are not in popular language called infidels,
Ecclesiastical Dictionary: Containing, in Concise Form, Information upon Ecclesiastical, Biblical, Archæological, and Historical Subjects
Infidels.—By infidels we understand those to whom the Catholic religion has never been proposed in such a manner as to bring home to their minds the fact that they cannot prudently decline to embrace it. These are negative infidels, and are to be distinguished from men to whom the truth has been proposed
A Dictionary of Christ and the Gospels: Aaron–Zion
UNBELIEF.—The withholding of belief, incredulity. In respect to Divine things the term implies absence or faith, credence refused to religious tenets. Infidelity, in its sense of want of faith or belief, is a synonym; not, however, scepticism, for the latter word is more properly used of the indecision
The Zondervan Encyclopedia of the Bible, Volume 3, H–L
infidel (from Lat. infidelis, “unfaithful”). One who is not among the faithful; an unbeliever. Its earliest English reference was to the Saracens (Muslims) who embraced a religion opposed to Christianity. Muslims came to use an equivalent expression denoting all who are not part of Islam. In the ecclesiastical
A Dictionary of Early Christian Beliefs: A Reference Guide to More than 700 Topics Discussed by the Early Church Fathers
Unbelieving Spouse
UNBELIEVING SPOUSEA woman who has a husband who does not believe, if he is willing to live with her, let her not divorce him. For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband. 1 Cor. 7:13, 14.Likewise you wives, be submissive to your own husbands,
Key passages
Mt 17:17

And Jesus answered and said, “O unbelieving and perverse generation! How long will I be with you? How long must I put up with you? Bring him here to me!”

Lk 24:25–26

And he said to them, “O foolish and slow in heart to believe in all that the prophets have spoken! Was it not necessary that the Christ suffer these things and enter into his glory?”

Heb 3:12

Watch out, brothers, lest there be in some of you an evil, unbelieving heart, with the result that you fall away from the living God.

Re 21:8

But as for the cowards and unbelievers and detestable persons and murderers and sexually immoral people and sorcerers and idolaters and all liars, their share is in the lake that burns with fire and sulphur, which is the second death.

See also
Topics & Themes