Tauheed
"I believe in ALLAH, in His Angels, His Scriptures, His Prophets, the Day of Judgment, and in the fact that every thing good or bad (in the world) is pre-destined by ALLAH the Exalted, and in the resurrection after death."
Tauheed, the Oneness of ALLAH (s.w.t) for a Muslim is:
" ALLAH, there is no god but He, the Living, the Everlasting; slumber does not seize him nor does sleep; to Him belongs whatever is in the heavens and whatever is in the earth. Who is there that shall intercede with Him, except by His permission? He knows what is before them and what is after them, but they do not comprehend anything of His knowledge, except what He will. His Throne extends over the heavens and earth, and their guarding does not strain Him; and He is the High, the Great". ( 3 : 255 ) Al-Quran.
We say about ALLAH's unity believing by ALLAH's help; that ALLAH is One, without any partners. There is nothing like Him. There is nothing that can overwhelm Him. There is no god other than Him. He is the Eternal without a beginning and enduring without end. He will never perish or come to an end. Nothing happens except what He wills. No imagination can conceive of Him and no understanding can comprehend Him. He is different from any created being. He is living and never dies and is eternally active and never sleeps. He creates without His being in need to do so and provides for His creation without any effort. He causes death with no fear and restores to life without difficulty. He has always existed together with His attributes since before creation. Bringing creation into existence did not add anything to His attributes that was not already there. As He was, together with His attributes, in pre-eternity, so He will remain throughout endless time. It was not only after the act of creation that He could be described as "The Creator" nor was it only by the act of origination that He could he described as "The Originator". He was always the Lord even when there was nothing to be Lord of, and always the Creator even when there was no creation. In the same way that He is the "Bringer to life of the dead", after He has brought them to life a first time, and deserves this name before bringing them to life, so too He deserves the name of "Creator" before He has created them. This is because He has the power to do everything, everything is dependent on Him, everything is easy for Him, and He does not need anything.
"There is nothing like Him and He is the Hearer, the Seer". ( 42 : 11 ) Al-Quran.
He created creation with His knowledge. He appointed destinies for those He created. He allotted to them fixed life spans. Nothing about them was hidden from Him before He created them, and He knew everything that they would do before He created them. He ordered them to obey Him and forbade them to disobey Him. Everything happens according to His decree and will, and His will is accomplished. The only will that people have is what He wills for them. What He wills for them occurs and what He does not will, does not occur. He gives guidance to whoever He wills, and protects them, and keeps them safe from harm, out of His generosity; and He leads astray whoever He wills, and abases them, and afflicts them, out of His justice. All of them are subject to His will between either His generosity or His justice. He is exalted beyond having opposites or equals. No one can ward off His decree or put back His command or overpower His affairs. We believe in all of this and are certain that everything comes from Him. The Existence is Infinite and ALLAH has encircled the Infinite Existence, and the Infinite existence has encircled all existent things, so there is no possibility of any other god beyond ALLAH. The existence of creatures is very weak before the Existence of Him. When we and you cannot allow any other being to enter into our own limits of existence despite such weakness, then how ALLAH, with such a tremendous strength of existence, can allow any other god to enter into His dominion ? In short, there is no space for any other god to enter the Divine Dominion. As such there is no rational possibility to believe in any other god beyond ALLAH. He is the origin of all creatures. He is alone the Master of all creations, man, angel, jinn etc. All creatures are the slaves and servants of ALLAH, the Lord of the Universe. So it is incumbent on every soul in the great Universe to recognize and acknowledge the Lordship of ALLAH, His Divine Unity and denounce all quarters of polytheism. When He is the Creator of all creatures and He provides for them all necessities, obedience to Him is obligatory and binding on all creatures whether man, animals, mountains, angels, trees, stars, moon, and sun. Men and jinn have wish, but other creatures have no wish, they are completely subservient to the Divine Commands or the Laws of Nature. Other creatures have no wish of their own, so they are not susceptible to disobedience. The word disobedience does not come in the orbit of other creatures. It is only man or jinn who can obey and disobey alike. He is given freedom of choice. He is given Reason or Wisdom to judge and take action accordingly.