" ... the words of Bahá’u’lláh are the essences of the words of the Prophets of the past."

"From time immemorial the divine teachings have been successively revealed, and the bounties of the Holy Spirit have ever been emanating. All the teachings are one reality, for reality is single and does not admit multiplicity. Therefore, the divine Prophets are one, inasmuch as They reveal the one reality, the Word of God. Abraham announced teachings founded upon reality, Moses proclaimed reality, Christ established reality and Bahá’u’lláh was the Messenger and Herald of reality. But humanity, having forsaken the one essential and fundamental reality which underlies the religion of God, and holding blindly to imitations of ancestral forms and interpretations of belief, is separated and divided in the strife, contention and bigotry of various sects and religious factions. If all should be true to the original reality of the Prophet and His teaching, the peoples and nations of the world would become unified, and these differences which cause separation would be lost sight of. To accomplish this great and needful unity in reality, Bahá’u’lláh appeared in the Orient and renewed the foundations of the divine teachings. His revelation of the Word embodies completely the teachings of all the Prophets, expressed in principles and precepts applicable to the needs and conditions of the modern world, amplified and adapted to present-day questions and critical human problems. That is to say, the words of Bahá’u’lláh are the essences of the words of the Prophets of the past. They are the very spirit of the age and the cause of the unity and illumination of the East and the West. The followers of His teachings are in conformity with the precepts and commands of all the former heavenly Messengers. Differences and dissensions, which destroy the foundations of the world of humanity and are contrary to the will and good pleasure of God, disappear completely in the light of the revelation of Bahá’u’lláh; difficult problems are solved, unity and love are established. For the good pleasure of God is the effulgence of love and the establishment of unity and fellowship in the human world, whereas discord, contention, warfare and strife are satanic outcomes and contrary to the will of the Merciful...."

`Abdu'l-Bahá, The Promulgation of Universal Peace, pp.313-314

5 September 1912 
(excerpt from) Talk at St. James Methodist Church 
Montreal, Canada