The Station of Christ – is Jesus the only Son of God?

"As regards to your questions concerning the station of Jesus Christ, and His return as explained in the Gospel. It is true that Jesus referred to Himself as the Son of God, but this, as explained by Bahá'u'lláh in the 'Íqán, does not indicate any Physical relationship whatever. Its meaning is entirely spiritual and points to the close relationship existing between Him and the Almighty God. Nor does it necessarily indicate any inherent superiority in the station of Jesus over other Prophets and Messengers. As far as their spiritual nature is concerned all Prophets can be regarded as Sons of God, as they all reflect His light, though not in an equal measure, and this difference in reflection is due to the conditions and circumstances under which they appear." (From a letter written on behalf of the Guardian to an individual believer, November 29, 1937; Lights of Guidance, p. 490)

Christ Established Unity of Communities and Nations, Baha’u’llah will Establish Unity of East and West

Christ appeared in this world nineteen hundred years ago to establish ties of unity and bonds of love between the various nations and different communities. He cemented together the sciences of Rome and the splendors of the civilization of Greece. He also accomplished affiliation between the Assyrian kingdom and the power of Egypt. The blending of these nations in unity, love and agreement had been impossible, but Christ through divine power established this condition among the children of men.
A much greater difficulty confronts us today when we endeavor to establish unity between the Orient and the Occident. Bahá'u'lláh through the power of heaven has brought the East and the West together. Erelong we shall know that they have been cemented by the power of God.
(Abdu’l-Baha, the promulgation of Universal Peace, p. 18)

The Heavenly Jerusalem

It is said in the Gospels, "Jerusalem will come down out of heaven from God." This heavenly Jerusalem is not made of stone, of lime and of clay, but it is made of the divine teachings which shine among men by the power of the spirit. For a long time, the divine teachings had been forgotten, no trace remained of the light of the heavenly Jerusalem. When Baha’u’llah manifested Himself from the Orient the light of His divine teachings shone forth in Persia unto other parts of the world. This divine teaching is the heavenly Jerusalem which has again "come down out of heaven." Although that edifice had fallen to pieces, it is founded anew. The corporal and material forces ruled over the Orient; now the spiritual forces have taken their place. (‘Abdu’l-Baha, from a talk given in Paris on November 9th, 1911; Star of the West, vol. II, no. 17, January 1912)

Does Evil Really Exist?

As to thy question, "That Abdul-Baha hath said to some of the believers that evil never exists, nay rather, it is a non-existent thing:" This is but truth, inasmuch as the greatest evil is (man's) going astray and being veiled from Truth. Error is lack of guidance; darkness is absence of light; ignorance is lack of knowledge; falsehood is lack of truthfulness; blindness is lack of sight; and deafness is lack of hearing. Therefore, error, blindness, deafness and ignorance are non-existent things. If we say that according to the text of the Bible, "God hardened Pharaoh's heart" that he might not believe in Moses, this signifies that, verily, He did not soften his heart. And when we wish to say that God hath not guided a certain one of His servants, this would be interpreted (by people) that God led him astray. The darkness spoken of in the Bible as being created by God, signifieth that, verily, God hath not caused light to shine; inasmuch as where there is no light, there will be darkness; when there is no sight, there will be blindness; when there is no life, there will be death; when there is no riches, there will be poverty; and when there is no knowledge, there will be ignorance. Consequently, it is proven by indisputable argument and clear explanation that, verily, evils are non-existent, but people have not understood the meaning of the verses of the Bible. (Abdu'l-Baha, Tablets of Abdu'l-Baha v3, p. 609)

Peter, the Chief of the Apostles

Peter, the chief of the apostles, used to divide the proceeds of his fishing into seven parts, and when, having taken one part for each day's use, he arrived at the seventh portion, he knew it was the Sabbath day. Consider this! and then think of his future position; to what glory he attained because the Holy Spirit wrought great works through him. (Abdu'l-Baha, Paris Talks, p. 164)