The Kaaba, the holiest site of Islam, literally means “the cube”. The Kaaba’s eastern cornerstone is known as the Black Stone, a relic traditionally dated to the life of Adam and Eve. Islamic tradition holds that Adam built the first structure on earth in the spot the Kaaba now occupies. The prophet Ibrahim (the biblical Abraham) and his son Ishmael rebuilt the Kaaba on the foundations left by Adam.
As part of the hajj pilgrimage, pilgrims perform the tawaf, a ritual in which they circumambulate the Kaaba seven times. The tawaf of millions of Muslims around the the structure represents the unity of believers in worshiping God. Although these movements are done simply out of this ritual significance, the seven anti-clockwise circumambulations around the Kaaba (the Cube) also mirror the order of the universe itself. Just as the stars revolve around their galaxy center, the planets around the sun, the electrons around the nucleus, and everything around its axis - so does the heart of the pilgrim revolve around the thoughts of its Maker.
It is important to note that the Kaaba is not an object of worship, it is only considered a direction of prayer by Muslims, a mosque that links believers throughout the ages back with the Adamic times and therefore, back to our purpose here on earth. The Kaaba is therefore a point not only in space, but also in time, in sacred memory - an earthly compass that points to directions beyond directions.
The four corners of the Kaaba roughly point toward the four cardinal directions of the compass. It is also, the meeting point of the millions of imaginary axes created when Muslims anywhere in the world face its direction as a spatial reference to establish their prayers.
During the hajj pilgrimage, the view of tens of thousands of Muslims of all ages, sexes, races and nationalities circling around the Kaaba resembles the view of the stars in a galaxy turning together around a common center, a whirlpool in a sea of mankind. The pilgrim enters this orbit, lets himself or herself be controlled by that spiritual flow and experience something of what it is like to be a drop in that sea, lost in worship. One with the sea of humans around him, and one with the One.