But we can't even comprehend or fully explain how our own consciousness work and where it come from. Then how can you be definite about how the universe works and what it is and say that there is no higher power?
Consciousness is easily explainable due to brains becoming larger and skull size increasing. This holds true for all animals as Homo sapiens are certainly not the only species to exhibit consciousness or even self-consciousness. Your dog would be aghast to think you don`t even recognize his mental prowess.
Also, if a question does not yet have an answer or is not discovered yet, it is completely all right to say "We do not know yet" rather than make the leap in false logic and attribute or assign said question with a dissatisfying, non-factual, nonsensical irrational and pointless origin or summation based on zero evidence.