* The word ecumenism (also oecumenism, ścumenism) is derived from Greek οἰκουμένη (oikoumene), which means "the inhabited world", and was historically used with specific reference to the Roman Empire. The word is used predominantly by and with reference to Christian denominations separated by doctrine, history and practice.
In its broadest meaning, ecumenism refers to initiatives aimed at worldwide religious unity. It is understood in this sense in the Baha'i vision that advocates a greater shared spirituality across Christian, Jewish and Islamic faiths as part of its core beliefs.
In a narrower and more common sense, ecumenism refers to the movement towards unity among Christians. In this sense, ecumenism is based on the idea that there should be a single Christian Church, a single Christian faith.
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"They say, 'Accept the Jewish or the Christian faith and you shall be rightly guided.' Say, 'By no means! We believe in the faith of Abraham, the upright one. He was no idolater.'" (Surah 2:135)
"The only true faith in God's sight is Islam." (Surah 3:19)
"Say, 'Obey Allah and the apostle.' If they give no heed, then truly, Allah does not love the unbelievers." (Surah 3:29)
"If you fear that you cannot treat orphans with fairness, then you may marry other women that seem good to you: two, three or four of them." (Surah 4:1)
"Try as you may, you cannot treat all your wives impartially." (Surah 4:3)
"Men take authority over women... As for those who are disobedient, admonish them and send them to beds apart and beat them." (Surah 4:34)
"Believers, do not approach your prayers when you are drunk, but wait till you can grasp the meaning of your words..." (Surah 4:43)
"Will they not ponder on the Koran? if it had not come from God, they could have surely found in it many contradictions." (Surah 4:82)
"Seek out your enemies relentlessly." (Surah 4:104)
"They denied the truth and uttered a monstrous falsehood against Mary. they declared: 'We have put to death the Messiah, Jesus the son of Mary, the apostle of God.' they did not kill him, nor did they crucify him, but they thought they did...they did not slay him for certain. God lifted him up to him..." (Surah 4:157-158)
"The Jews and Christians say: 'We are the children of God and His loved ones.' Say: 'Why then does He punish you for your sins?" (Surah 5:18)
"Believers, take neither Jews nor Christians for your friends." (Surah 5:51)
"Unbelievers are those who say: 'God is one of three.' There is but one God. If they do not desist from so saying, those of them that disbelieve shall be sternly punished." (Surah 5:73)
"If you fear treachery from any of your allies, you may fairly retaliate by breaking off your treaty with them." (Surah 9:12)
"Fight against such as those to whom the Scriptures were given [Jews and Christians]...until they pay tribute out of hand and are utterly subdued." (Surah 9:29)
"The Christians say: The Christ is the son of Allah; these are the words of their mouths; they imitate the saying of those who disbelieved before; may Allah destroy them." (Sura 9:30)
"Prophet make war on the unbelievers and the hypocrites and deal rigorously with them. Hell shall be their home." (Surah 9:73)
"And say: All praise is due to Allah, WHO HAS NOT TAKEN A SON and WHO HAS NOT A PARTNER in the kingdom."(Sura 17.111)
"'How shall I bear a child,' she [Mary] answered, 'when I am a virgin...?' 'Such is the will of the Lord,' he replied. 'That is no difficult thing for Him...God forbid that He [God[ Himself should beget a son!...Those who say: 'The Lord of Mercy has begotten a son,' preach a monstrous falsehood..." (Surah 19:20-21, 29, 88-89)
"NEVER DID ALLAH TAKE TO HIMSELF A SON, and never was there with him any (other) god . . ." (Sura 23:91)
"Muhammad is God's apostle. Those who follow him are ruthless to the unbelievers but merciful to one another." (Surah 48:29)