I would disagree with you completely. I know that I am not wrong. I don’t make this statement lightly, or from an understanding based on opinion, or simply what I have been taught or studied. Rather, I make this statement from an experienced position. I was a liar, a thief, a drunk and a fornicator, but God, through Jesus Christ has saved me and changed me (1 Corinthians 6:9-11). I am adopted into the family of God (Romas 8:16, Ephesians 1:5). I am not who I used to be (2 Corinthians 5:17). This is not because I have a greater knowledge or opportunity, but rather this is open and available for anyone and everyone (Romans 10:13) through repentance and faith (Acts 20:21).

What is science? it is man studying and gaining knowledge of what is studied. Science tries to determine the what, how and why of things. However, this is wrong from its conception. Not the desire to know these things, but because it is based on fallen man’s ability. Which is why man is always proving and disproving theories. Therefore man’s assessments are always open to revision or change. Why, because man is fallen, and his reasoning is based on his fallen understanding.

Which leads me to your question of how can we believe the Bible. Allow me to say that the Bible has never been revised, why? Because to revise means to correct or improve something. The Bible tells us that God cannot lie(Hebrews 6:18) and the Bible is the written testimony of Christ (John1:1, 1.14 ). In fact The Bible states that Jesus Christ is THE Truth (John 14:6). The Bible is the word of truth (2 Timothy 2:15). The Bible also says that Jesus Christ is the same yesterday, today and forevermore (Hebrews13:8). So for one to say that the Bible has errors or decrepancies would be calling God a liar. To which he is not, because as shown earlier, it is impossible for him to do. However, satan is a liar and the father of it (John 8:44). So to conclude, I choose to believe God rather than man because God is true, and man is a liar (Romans 3:4)

So to answer your question, yes, we are to simply believe the Bible because it’s true.