Book excerpt: Every human being seeks salvation in some form or another. The concept of salvation holds pivotal importance in matters of religion. A faith unable to deliver its followers from sin is worthless, yet the progress and benefit of society depends on this very salvation. So where should one turn to attain it? In this work, Mirza Ghulam Ahmad of Qadian, the Promised Messiah and Mahdi, explains that since human nature is weak, salvation can only be attained through a mediator who, owing to their perfect relationship with God and deep sympathy for humanity, can serve as a link between God and man. In every era, God has conferred salvation upon humanity through His prophets, but none can match the unparalleled status held by the Prophet of Islam in this respect, who was the paragon of perfection. In the present age, it is this pure and blessed prophet who is the only intercessor that can grant humanity a living relationship with God and free mankind from the shackles of sin. The author presents an exquisite exposition on the philosophy of divine intercession, sinlessness, forgiveness, human frailty and his advent as the Promised Messiah.