Pilgrimage is a practical expression of Tawheed.

This is what the pilgrim announces at the beginning of his Hajj, as Djabir ibn Abd-Allah says in his description of the pilgrimage of the Prophet (peace and blessings of Allah be upon him (S.A.W)): "He (the Prophet) proclaimed the tawhid  :  Labbayka lahbayka Labbayka la sharika laka Labbayka Inna al-hamda wa an-ni'mata lakawal moulk Laa Sharika laka. ".

 The Hajj makes it possible to remember the afterlife when all the pilgrims gather on the esplanade of Arafat and elsewhere in the same state and without any distinction. Here all differences disappear and nobody is superior to anyone.

The Hajj symbolizes the unity of the Muslims because the pilgrims are equal in their dress, in the rites they observe. They all face the same qibla (direction of La Kaaba) and head towards the best places. No one is superior to another, neither ruler, nor governed, nor rich, nor poor, neither black nor white. Here the pilgrims are equal in rights and duties: "they are all of Adam and this is from the earth. Arabic is not superior to the non-Arab, nor the white to the black, except by piety." As claimed by our Prophet (peace and blessings of Allah be upon him) on his farewell pilgrimage. (S.A.W)

The entrance into the state of sacredness (Ihram) from the places intended for this purpose expresses the bondage towards Allah marked by obedience and submission to His order and His law. Therefore, no one must go beyond the said places (without sacralizing) since such is the order of Allah which is expressed in His law. This reflects the unity of the Umma and its organizational discipline which should exclude division and divergence over the fixing of the said places.