India is a religious country so religion and spirituality are often used as synonyms. While religion is more to do with rituals, spirituality is that which has to do with one’s Self or, the spirit. Anything done for its growth and advancement is spirituality. They are not opposed, but stem from one another. While religion is more organised and includes public rituals, spirituality is more private and personal.

Hindus:
80% of Indians are Hindus. Some of the most important texts of Hinduism, the Vedas, are believed to have been written around 1500 BCE, although this is not certain. The Vedas outline the basic philosophy of Hinduism and are expanded in texts called the Upanishads. Hindus believe that there is a single, supreme power who is creator, preserver, and destroyer of the universe. This power exists over all, without definate form, and is Supreme--God.

However, many Hindus see God in all aspects of life and all things. To help them understand and feel connected to the Supreme Power, they describe its innumerable attributes and aspects using different names and images. These attributes make up the panthenon of images in Hinduism. Some of the most common names given to the Supreme Power are Brahma, Vishnu, Devi, and Saraswati.

Muslims:
About 14% of Indians are Muslims and practice Islam. This religion was popularized in approximately 610 CE by Muhammad. The holy text of Islam is the Qu'ran and includes the teachings of Muhammad. Like Hinduism, Islam recognizes only one God. But in Islam, there is only one name for this Power--Allah.

Observant Muslims pray facing Mecca five times a day. They also adhere to other guidelines in their lives including charity to neighbors, observance of certain fasts, dietary laws, and pilgrimage to Mecca and Medina.
Christians and Sikhs-- even more religions:

Christians also live in India and make up 2.5% of the population.

Another 2% are Sikhs. Like Hindus, Sikhs believe in one God, but they do not accept the Hindu caste system. They have many things in common, however, such as a belief in rebirth and the power of God to shape human destiny. Many Sikhs live in the state of Punjab. They practice immense hospitality and tolerance of others. Some intermarry Hindus.