From a site called “The Web Yeshiva Blog”:
Let me ask you a simple question – how easy do you think it is to have a universe that has creatures like us. That is, a universe that contains self-aware, thinking, emotional creatures like ourselves. It seems not so easy. To create a universe with a creature like man you need numerous essential physical elements and laws precisely crafted and calibrated in order to have a working, functioning universe with conscious, sentient beings. Not only do you need obvious elements like matter and energy, but you need laws to govern that matter and energy (like the laws of gravity and the strong and weak nuclear laws). What’s more, those laws have have just the right amount of force or energy to do their job properly. Sometimes, there’s a very narrow margin of error in the midst of a rather large number of possible configurations for the elements and laws of the universe.
This is what is known as the Fine Tuned Universe – i.e., a universe which seems to have been precisely crafted and organized in order to enable creatures like man to both exist and gain some level of understanding of the world which he lives.
The answer to that opening question is: it is the easiest thing in the world. You only need to open your eyes, look around, and live your life.
But then he brings up the notion of “creating” and/or “fine tuning” the universe, which is naturally quite impossible.
In order to create the universe, you would have to start with nothing — and you cannot get there. In order to tune the universe, you would need to be able to violate the law of identity/causality — that is, to make reality be not really real after all.