They were all created by the Eru's thought, even the Dwarves, Ents, Orcs and such like being that he knows everything that is, has and will happen. All his children were powerful in their own right, however only Melkor and possibly Sauron learned to live because of the fact they learned to fear for them selves, therefore being able to embrace life, or in their cases trying to either conqueor or destroy life in order to keep theirs safe. Otherwise do you think when Sauron was destroyed for the last time he would have gone to Aman to beg for his spirit, do you think Morgorth would have feigned rehabilitation in order to be freed of bondage. No they wouldn't. The fact that the Elves join the Ainur at the end and the fact that they can out preform the Ainur in some areas shows that they are just as equal and this is the reason the Elves did not worship the Ainur as gods. The Humans have a different fate set aside for them, that all the elves and even the ainur fear and envy, making them also just as powertful as the Ainur and Elves, it was only through the corruption of Morgorth towards Humans that they began to fear this blessing and begin to worship the Ainur and to a lesser extent the Elves as gods or holy beings, because they had developed a fear of death!
Sod off I'm busy!