The foundation of all knowledge is based on knowing Allah. The knowledge of one who does not know Allah is meaningless.
“They did not justly appraise (the manifestations of the qualities denoted by the Name) Allah.” 
“Did you see the one who deified his baseless desires and thus who Allah led astray in line with his knowledge (assumption) and sealed his ability to sense the reality and veiled his vision?”
“Do not turn to (assume the existence of) a god (exterior manifestations of power or your illusory self) besides Allah.”
“Say: ‘Allah’ and let them amuse themselves in their empty discourse (their illusory world) in which they are absorbed.”
Evident is the Truth if only you wished to see… It is the Self that exists, if only you can erase your name! You think you exist, yet this is only your assumption! The Truth is your essence, if only you can see your ‘self’!
I named one of my books Muhammad’s Allah. Some may find it a little striking. They may wonder, “Why not name it just Allah, why Muhammad’s Allah?” Simply because the majority of the people use this name to reference their own imagined gods! What they reference as ‘Allah’ in their heads has nothing to do with the reality of Allah at all. Unfortunately, the majority of these people, who base their lives around their postulated deity-gods, are going to end up in severe loss and disappointment when they find out such gods do not exist.
In Muhammad’s Allah I tried to explain how and why Allah is not a ‘god’ in the general sense, and that traditional conceptions of god, based on age-old conditionings, have nothing to do with the reality disclosed by Muhammad (saw).
Everyone, from the least developed to the most developed, has an understanding of a god… A deity who they love and respect, or get angry with from time to time… As if He is a benevolent father sitting on a star or a majestic sultan in the heavens – while those with broader views claim such a god cannot exist and declare not to be believers.
It is important to understand that the practices recommended by the Rasul of Allah (saw) are the very things that are going to be necessary for a person in his life after death in order to live in bliss and not be subject to harm. Whether the person takes advantage of these recommendations or not, its consequences binds him alone.