The five pillars of faith form the foundation for the superstructure of Islam. Their gist is contained in the short sentence known as Kalimah-tayyibah (also called the Shahada).
When you declare La ilaha illallah (their is no deity but Allah), you give up all false deities, and profess that you are a creature of the One God; and when you add to these words Muhammad-ur-Rasulullah (Muhammad is Allah's Messenger) you confirm and admit the Prophethood of Muhammad (blessings of Allah and peace be upon him).
With the admission of his Prophethood it becomes obligatory that you should believe in the divine nature and attributes of God, in His angels, in His Revealed Books and life after death, and earnestly follow that method of obeying God and worshipping Him which the Prophet Muhammad (blessings of Allah and peace be upon him) has asked us to follow.
