Sikhism was established and developed by ten Gurus during the period 1469 to 1708. Sikhs regard the ten Gurus not as divine, but as enlightened teachers through whom God revealed his will. Each Guru appointed his successor. Guru Nanak Dev was the first Guru and Guru Gobind Singh the final Guru in human form. Guru Gobind Singh designated the Sri Guru Granth Sahib the ultimate and final Sikh Guru.
Sikhism emerged in 16th-century India in an environment heavily permeated with conflicts between the Hindu and Muslim religions. It was somewhat influenced by reform movements in Hinduism (e.g. Bhakti, monism, Vedic metaphysics, guru ideal, and bhajans) as well as some Sufi Muslim influences. While Sikhism reflects its cultural context, it certainly developed into a movement unique in India. Sikhs regard their faith as an authentic new divine revelation.
Sikhism was founded by Guru Nanak Dev, who was born in 1469 to a Hindu family. Guru Nanak's most famous saying is, "There is no Hindu, there is no Muslim, so whose path shall I follow? I shall follow the path of God."
Retaining the Hindu doctrine of the transmigration of souls, together with its corollary, the law of karma, Guru Nanak advised his followers to end the cycle of reincarnation by living a disciplined life – that is, by moderating egoism and sensuous delights, to live in a balanced worldly manner, and by accepting ultimate reality. Thus, by the grace of Guru (Gurprasad) the cycle of reincarnation can be broken, and the Sikh can remain in the abode of the Love of God. Guru Nanak taught that salvation does not mean entering paradise after a last judgment, but a union and absorption into God, the True Name. Sikhs do not believe in a heaven or hell. Sikhs also reject the Hindu belief in incarnations (avatars) of God, believing instead that God makes his will know through the Gurus.
The most easily observable Sikh practices are the wearing of the turban and the Five Ks. Sikhs also pray regularly and meditate by repeating God's name, often with the aid of rosary beads. Sikhism rejects the Hindu notion of the four stages of life, teaching instead that the householder is the ideal for all people. A Sikh aims to live a life that balances work, worship and charity. Community is emphasized, and the Sikh temple (gurdwara) is the center of Sikh communal life.
*Source: Religious Facts