"It is rightly said that it [the Hajj] is the perfection of faith since it combines in itself all the distinctive qualities of other obligatory acts. It represents the quality of Salaah [prayer] since a pilgrim offers prayers at the Ka'bah, the House of the Lord. It encourages spending of material wealth for the sake of the Lord, the chief characteristic of Zakaah. When a pilgrim sets out for Hajj, he dissociates himself from his hearth and home, from his near and dear ones to please the Lord. He suffers privation and undertakes the hardship of journey - the lessons we learn from fasting and i'tikaaf. [1]
In Hajj one is trained to be completely forgetful of the material comforts and pomp and show of worldly life. One has to sleep on stony ground [2], circumambulate the Ka'bah, run between Safaa and Marwa and spend his night and day wearing only two pieces of unsewn cloth. He is required to avoid the use of oil or scent or any other perfume. He is not even allowed to get his hair cut or trim his beard. In short, he is commanded to abandon everything for the sake of Allaah سبحانه و تعالى and submit himself before his Lord, the ultimate aim of the life of a Muslim. In fact, physical pilgrimage is a prelude to spiritual pilgrimage to Allaah سبحانه و تعالى, when man would bid goodbye to everything of the world and present himself before Him as His humble servant saying: 'Here I am before Thee, my Lord, as a slave of Thine.'" [3]
Allaah سبحانه و تعالى says about the Hajj,
"And proclaim to mankind the Hajj (pilgrimage). They will come to you on foot and on every lean camel, they will come from every deep and distant (wide) mountain highway (to perform Hajj). That they may witness benefits for themselves and mention the name of Allah on known days over what He has provided for them of [sacrificial] animals. So eat of them and feed the miserable and poor." (Soorah Hajj, 22:27-28)
The word "benefits" is in the indefinite, implying all types and numerous forms of benefit. Most notable among these benefits, Karzoon notes, are the purification of the soul, refinement of character, refreshing of one's spirit and the spiritual training that takes place in the most honourable land on this earth. [4]
Notes:
[1] I'tikaaf is where one secluded himself in the Mosque for personal worship and devotion. Most commonly, this is done at the end of the month of Ramadaan.
[2] This is not a must but it is how many pilgrims spend their nights.
[3] Abdul Hameed Siddiqi, trans., Saheeh Muslim (Beirut: Dar al-Arabia, n.d.), Vol. 2, p. 577. The last statement he made is very close to what the pilgrims chant during the pilgrimage.
[4] Purification of the Soul

