Salaam and Greetings of Peace:
In the same way that Muhammad(un) rasul Allah (Muhammad is the Messenger of God) follows La Ilaha ill Allah, the names of the Prophet (pbuh) flow from those of God and are a ladder that leads to Him. The Prophet (pbuh) has even been honored by God by having some of the Divine Names such as Ta Ha and Nur also bestowed upon him. The chanting of the litanies of the names of the Prophet (pbuh) is an important practice in Sufism and on a more external level in the everyday activity of many pious Muslims.
Not only is the Prophet (pbuh) called Muhammad, the most praised one, but he is also Ahmad, the most praiseworthy of those who praise God. He is Wahid, the unique one; Mahi, the annihilator of darkness and ignorance; and Aqib, the last of the prophets. He is Tahir, the pure and clean one; Tayyib, he who possesses beauty and fragrance; and Sayyid, prince and master of the universe. He is, of course, Rasul, messenger, but also Rasul al-Rahmah, the messenger of mercy; and Khatim al rusul, the seal of prophets. He is Abd Allahl, the perfect servant of God, but also Habib Allah, the beloved of God; and Safi Allah, the one chosen by God. He is both Nasir, the victorious helper of men, and Mansur, the one who is made triumphant in this world.
The Prophet (pbuh) is Muhyi, the vivifier of the dead hearts of men, and Munji, he who delivers man from sin. He is Nur, light, as well as Siraj, the torch that illuminates the path in man’s life; Misbah, the lamp that contains the light of faith, and Huda, the guide to God and paradise. He is Dhu quwwah, the possessor of strength; Dhu hurmah, possessor of sacred reverence; and Dhu makanah, the possessor of integrity. He is both Amin, trustworthy, and Sadiq, truthful. He is miftah, or key to paradise, and Miftah al-rahmah, the key to God’s mercy. The love of the Prophet (pbuh) is in fact both a sign of the love of God and the gate to that Mercy from which the very substance of the universe was created.
From Islamic Spirituality, edited by Seyyed Hossein Nasr.