First, He has proclaimed the oneness of mankind and specialized religious teachings for existing human conditions. The first form of dissension arises from religious differences. Bahá’u’lláh has given full teachings to the world which are conducive to fellowship and unity in religion. Throughout past centuries each system of religious belief has boasted of its own superiority and excellence, abasing and scorning the validity of all others. Each has proclaimed its own belief as the light and all others as darkness. Religionists have considered the world of humanity as two trees: one divine and merciful, the other satanic; they themselves the branches, leaves and fruit of the divine tree and all others who differ from them in belief the product of the tree which is satanic. Therefore, sedition and warfare, bloodshed and strife have been continuous among them. The greatest cause of human alienation has been religion because each party has considered the belief of the other as anathema and deprived of the mercy of God. The teachings specialized in Bahá’u’lláh are addressed to humanity. He says, “Ye are all the leaves of one tree.” He does not say, “Ye are the leaves of two trees: one divine, the other satanic.” He has declared that each individual member of the human family is a leaf or branch upon the Adamic tree; that all are sheltered beneath the protecting mercy and providence of God; that all are the children of God, fruit upon the one tree of His love. God is equally compassionate and kind to all the leaves, branches and fruit of this tree. Therefore, there is no satanic tree whatever—Satan being a product of human minds and of instinctive human tendencies toward error. God alone is Creator, and all are creatures of His might. Therefore, we must love mankind as His creatures, realizing that all are growing upon the tree of His mercy, servants of His omnipotent will and manifestations of His good pleasure.