Main Pillars

Shahadah

The first pillar of Islam is that a Muslim believe and declare his faith by saying the Shahadah (lit. 'witness'), also known as the Kalimah:

La ilaha ila Allah; Muhammadur-rasul Allah. 'There is no god but Allah; Muhammad is the Messenger of Allah.'

This declaration contains two parts. The first part refers to God Almighty, the Creator of everything, the Lord of the Worlds; the second part refers to the Messenger, Muhammad (pbuh) a prophet and a human being, who received the revelation through the Archangel Gabriel, and taught it to mankind.
By sincerely uttering the Shahadah the Muslim acknowledges Allah as the sole Creator of all, and the Supreme Authority over everything and everyone in the universe. Consequently the Muslim closes his/her heart and mind to loyalty, devotion and obedience to, trust in, reliance on, and worship of anything or anyone other than Allah. This rejection is not confined merely to pagan gods and goddesses of wood and stone and created by human hands and imaginations; this rejection must extend to all other conceptions, superstitions, ideologies, ways of life, and authority figures that claim supreme devotion, loyalty, trust, love, obedience or worship. This entails, for example, the rejection of belief in such common things as astrology, palm reading, good luck charms, fortune-telling and psychic readings, in addition to praying at shrines or graves of "saints", asking the dead souls to intercede for them with Allah. There are no intercessors in Islam, nor any class of clergy as such; a Muslim prays directly and exclusively to Allah.
Belief in the prophethood of Muhammad (pbuh) entails belief in the guidance brought by him and contained in his Sunnah (traditions of his sayings and actions), and demands of the Muslim the intention to follow his guidance faithfully. Muhammad (pbuh) was also a human being, a man with feelings and emotions, who ate, drank and slept, and was born and died, like other men. He had a pure and upright nature, extraordinary righteousness, and an unwavering faith in Allah and commitment to Islam, but he was not divine. Muslims do not pray to him, not even as an intercessor, and Muslims abhor the terms "Mohamedan" and "Mohamedanism".