Tawheed (the Oneness of Allah) is the underlying concept behind Islam that we are constantly reminded of in the Quran. It is a very powerful notion that has changed the hearts of billions and billions of people towards their Lord, and has helped us connect with Him. Its charm lies behind its simplicity: There is only one god, Allah.
Ages and ages ago, long before we were born, before human civilization, before the dinosaurs, even before the universe was formed, and anything else that was created there was our Lord, Allah subhana wa ta’ala.
Many religions around the world already acknowledge there is a God, but have been still been subdued by Satan into ascribing partners to Him.
To complete Tawheed (Oneness of Allah) Allah's Names and Attributes need to similarly understood via the concept of Tawheed: He alone has the most perfect of names and qualities, and is not like the creation.
La ilaha illa Allah... a few words that may occasionally slip off our tongues, but these few words have the ability to move mountains, raise the best of nations, and its absense will lead to an end of this world.