"Jesus Christ gave His life upon the cross for the unity of mankind."

"The divine Prophets came to establish the unity of the Kingdom in human hearts. All of them proclaimed the glad tidings of the divine bestowals to the world of mankind. All brought the same message of divine love to the world. Jesus Christ gave His life upon the cross for the unity of mankind. Those who believed in Him likewise sacrificed life, honour, possessions, family, everything, that this human world might be released from the hell of discord, enmity and strife. His foundation was the oneness of humanity. Only a few were attracted to Him. They were not the kings and rulers of His time. They were not rich and important people. Some of them were catchers of fish. Most of them were ignorant men, not trained in the knowledge of this world. One of the greatest of them, Peter, could not remember the days of the week. All of them were men of the least consequence in the eyes of the world. But their hearts were pure and attracted by the fires of the Divine Spirit manifested in Christ. With this small army Christ conquered the world of the East and the West. Kings and nations rose against Him. Philosophers and the greatest men of learning assailed and blasphemed His Cause. All were defeated and overcome, their tongues silenced, their lamps extinguished, their hatred quenched; no trace of them now remains. They have become as nonexistent, while His Kingdom is triumphant and eternal.
'Abdu'l-Baha, The Promulgation of Universal Peace, p. 5