Islam is the greatest favor of Allah with which He has distinguished the mankind and Jinn. It is only a Deen which Allah made the last of all religions. He says: "Today, I have completed your deen for you, and perfected my favor upon you, and accepted Islam as a deen for you." (5:3) He also said: "And whoever seeks a religion other than Islam. It will never be accepted of him, and in the Hereafter he will be one of the losers." (3:85) Hence, It is the duty of every Muslim to value this divine favor by adhering to it. This could not be accomplished without understanding all the aspects of the religion which should be based on the Qur'an and the Sunnah.

It is for this reason we have chosen this book, "The Pillars of Islam" which explains the basic fundamentals of Islam i.e., the two Testimonies, the Prayer, the Zakat, the Fast and the Hajj. It is prepared by some research scholars of knowledge of the religion. This is a very important subject to acquire knowledge of as it is practiced by the tongue, the limbs, the heart and with one's wealth.