The way you answer that question impacts the way you are living your life. It impacts not only the individual, but your relationships, and eventually society as a whole. It’s not hard to prove this point. If you believe there is no God, you will live a certain way, as if God, His ways, and His existence doesn’t matter. And if you believe God and His will is vitally important and relevant to life, you will live another way. Either way, you can see that how we think about God is relevant to our entire society and life. How much more relevant would it be that God actually exist or not exist? That He actually has a perfect moral standard, and that Jesus really is the Son of God, the only one who can fill that standard on our behalf?
But how can we know the mind of God? It is popular today to think that no matter what we “decide for ourselves” to believe about God, we can’t know it for certain, so we must just “do our best” according to our own standards of good. Then God will just forgive our moral failure to meet His standards. But on whose authority is this opinion based? Is it in fact true? Or is it true that God is Yahweh as described in the Bible who “will by no means clear the guilty?” (Ex 34:7)
On what authority would you base your beliefs about God? Your opinions? Feelings? Experiences? Sort through the confusion and consider how you know who anyone is. Unless they reveal to you what is on their mind, you can’t know it. So are there, for example, reliable documents which God has had transmitted to us to do just that, revealing these very things? Yes. Test the Bible and see.
Therefore we must pay much closer attention to what we have heard, lest we drift away from it. For since the message declared by angels proved to be reliable, and every transgression or disobedience received a just retribution, how shall we escape if we neglect such a great salvation? It was declared at first by the Lord [Jesus], and it was attested to us by those who heard… (Hebrews 2:1-3 ESV)