In Ayat 4 of Surat Qalam of the Holy Qur'an (68:4), Allah Ta'ala, speaking about His Noble Messenger, Sallallahu alaihi Wasallam, says:--
"SURELY, YOU ARE UPON A TREMENDOUS CHARACTER (Khuluq azeem)"
When Sayyada A'isha, may Allah be pleased with her, was asked about the character of the Messenger of Allah, she answered: "His character was the Qur'an." She said that because he was unique in character and that unique character had to bring together all noble character traits. Allah, Subhanahu Wa Ta'ala, described that character as being "tremendous" just as He described the Qur'an in His words, "the tremendous Qur'an" (15:87). So, the Qur'an is his character, Sallallahu alaihi Wasallam.
If a person in the Community of the Messenger who has not met the Messenger of Allah desires to see him, let him look upon the Qur'an. When he looks upon it, there is no difference between looking upon it and looking upon Allah's Messenger. It is as if the Qur'an takes the configuration of a corporeal form which is named Muhammad Ibn Abdullah Ibn Abd al-Muttalib.
The Qur'an is Allah's Speech and His Attributes, so Muhammad in his entirety is the attribute of Allah, "So he who obeys the Messenger, has obeyed Allah"- (4:80), since "He does not speak out of caprice" (53:3)...Sallallahu alaihi Wasallam.