Concluding it might be difficult to proof the existence of god it is even more difficult to proof there does not exist a Causer of everything.
Only by a Most High Supreme Being that existed for ever causing everything to come into being, the being only can be a reality and as such to be a truth when that Eternal Causer, Provider and Most High Supreme Being is a realistic existing Thing or Personality. We must come to believe in Him and His Words calling for things to come in order from the chaos and His breath to be the life giving element. Even when there may have taken an evolution over a long period of time, looking at the complexity of all things we should be in awe and have more faith in a Master-hand behind everything, coming to see that without this Master Creator or Godly Designer has provided for life and consciousness having made beings to come to be able to think, handle and talk like human beings do.
Being conscious that nothing can be the cause of itself we have to look for That What is responsible to have the beginning of something and What gives life into it. Not finding anything which could create itself from nothing we should come to see Who is behind the beginning of everything. Ultimately we should conclude that there has to be a prime Beginning, or Something or Some One Who Causes, and that Causer we call the Creator is God.
We look at a visible or invisible God, Who is the Being Itself Which created heaven and earth and gave life into beings which got to be.