A common Christian "argument" ...
Jesus states that it is easier for the universe to fall apart than any one piece of the Mosaic law (Luke 15:17). Is your universe falling apart yet? If not, the Mosaic Law still applies.
Jesus berated people for disobeying the Mosaic Law (John 7:16-19).
Let's face it: Your god YHWH was dreamt up by a group of bedouin wanderers 4,000 to 5,000 years ago to explain things they didn't understand. Then, supposedly, his son came to earth and was born to a woman who had NEVER had sex (yeah, right), then he lived a perfect life, traveled about the countryside (with no source of income), gathered followers, made some outrageous claims, defied known laws of physics and medicine, cherry picked the rules his daddy made up, got himself killed by pissing off the establishment, and supposedly, came back to life. Then, to prove he was who he said he was, supposedly appeared to multiple followers ... but he won't do that today because it isn't his "will" and you just have to believe it happened and have faith. So, consider the irony ... he had to "prove" he was risen to SOME people, but YOU just have to have faith. They didn't have to have faith back then because they supposedly had evidence. With evidence, you don't need faith. Where there is no evidence, faith is a requirement. Why are we expected to believe a 2,000 - 3,000 year old book written by bedouin wanderers who orally passed down fairy tales around their campfires? A book full of contradictions (www.bibviz.com).
Your "personal relationship" with your god is solely between your ears, within the confines of your own mind. This is why your god can seem so very real to you. In a very real sense, he is real because HE ... is YOU. This is why your god's opinions are so very often your opinions. This is why two believers of the same religion can both claim to agree with god's opinion but not with each other's. When you pray and god gives you answers, YOU are the source of those instincts, those intuitions, those feelings, those "insights." When you pray and you believe you're hearing the voice of god, you're simply having a conversation with yourself and don't want realize it. This is why god can always assuage the doubts of the believer. Your "god" knows exactly how you think because he is you. He knows your tastes, your biases and all the gaps in your logic.