The first edition of the "Guru Granth Sahib" was written in the Gurmukhi script and recorded by Sikhism's fifth guru, Guru Arjan (1563-1606). The text is considered to contain the living spirit of the original 10 Sikh gurus, or prophet-masters, carrying forth the lineage of these founders.
The core principle of the "Guru Granth Sahib" is unity with God. It's teachings state that to be reunited with God, one must meditate on God's nam, or "name." This is necessary in reaching spiritual unity with the Divine.
In addition to the writings of the Sikh gurus, the "Guru Granth Sahib" incorporates teachings from a variety of both Islamic and Hindu saints. Unique to this holy text is that it was written directly by the Sikh gurus themselves and not, as in many other world religions, by the devotees or followers of the teachers. This makes the "Guru Granth Sahib" of particular historical interest as it is unusual among religious texts.