To a Muslim, Allah is the Almighty, Creator and Sustainer of the universe, Who is similar to nothing and nothing is comparable to Him. God states in the Quran for those who make Him like His creation or vice versa:
There is nothing similar to Him.
Allah is beyond complete human understanding
“…Muslims further recognize that Allah is beyond complete human understanding, as there is nothing in creation comparable to Him. Perhaps in the afterlife we will be gifted with greater understanding, but in this life, knowledge of our Creator is confined within the boundaries of revelation…”
-Source: Laurence B. Brown, MisGod’ed: A Roadmap Of Guidance And Misguidance In The Abrahamic Religions, pages 54–56 (PDF Version)
You will find that the people most hostile to those who believe are the Jews and the idolaters. You will find the people most affectionate to those who believe are those who say, ´We are Christians´. That is because among them are priests and monks, and they are not arrogant. And when they hear what was revealed to the Messenger, you see their eyes overflowing with tears, as they recognize the truth in it. They say, ‘Our Lord, we have believed, so count us among the witnesses.’ ‘And why should we not believe in God, and in the truth that has come to us, and hope that our Lord will include us among the righteous people?’ God will reward them for what they say — Gardens beneath which rivers flow, where they will stay forever. Such is the reward of the righteous.