Sikhism (), or Sikhi ( "", , from "Sikh", meaning a "disciple", or a "learner"), is a monotheistic Indian religion that originated in the Punjab region of the Indian subcontinent about the end of the 15th century. It is one of the youngest of the major world religions. The fundamental beliefs of Sikhism, articulated in the sacred scripture Guru Granth Sahib, include faith and meditation on the name of the one creator, unity of all humankind, engaging in selfless service, striving for social justice for the benefit and prosperity of all, and honest conduct and livelihood while living a householder's life. In the early 21st century there were nearly 25 million Sikhs worldwide, the great majority of them living in the Indian state of Punjab. 

Sikhism is based on the spiritual teachings of Guru Nanak, the first Guru, and the nine Sikh gurus that succeeded him. The Tenth Guru, Guru Gobind Singh, named the Sikh scripture Guru Granth Sahib as his successor, terminating the line of human Gurus and making the scripture the eternal, impersonal spiritual guide for Sikhs. Sikhism rejects claims that any particular religious tradition has a monopoly on Absolute Truth. 

Sikhism emphasises simran (meditation on the words of the Guru Granth Sahib), that can be expressed musically through kirtan or internally through Nam Japo (repeat God's name) as a means to feel God's presence. It teaches followers to avoid the "Five Thieves" (lust, rage, greed, attachment and conceit). Hand in hand, secular life is considered to be intertwined with the spiritual life. Guru Nanak taught that living an "active, creative, and practical life" of "truthfulness, fidelity, self-control and purity" is above the metaphysical truth, and that the ideal man is one who "establishes union with God, knows His Will, and carries out that Will". Guru Hargobind, the sixth Sikh Guru, established the political/temporal (Miri) and spiritual (Piri) realms to be mutually coexistent.
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