The Preaching of Islam:
By the order of God the Prophet (Peace Be Upon Him) began the preaching secretly first among his intimate friends, then among the members of his own tribe and thereafter publicly in the city and suburbs. He (Peace Be Upon Him) preached on the belief in,
One Transcendent God
Oneness of Mankind
Oneness of Messengers and the Message
Angels and the Day of Judgment
Innocence of Man at Birth
He invited men to charity & beneficence, to be kind to their parents & fellow human beings, to be dutiful & righteous and to establish peace & justice.