We should read and study the Bible because:
It is God's Word to us. The Bible is literally "God-breathed" (2 Timothy 3:16). In other words, it is God's very words to us.
It is totally reliable and without error.
God does not change and because mankind's nature does not change; it is as relevant for us as it was when it was written.
There is so much false teaching. The Bible gives us the measuring stick by which we can distinguish truth from error. It tells us what God is like.
The Bible equips us to serve God (2 Timothy 3:17; Ephesians 6:17; Hebrews 4:12). It helps us know how to be saved from our sin and its ultimate consequence (2 Timothy 3:15). Meditating on God’s Word and obeying its teachings will bring success in life (Joshua 1:8; James 1:25). God’s Word helps us see sin in our lives and helps us get rid of it (Psalm 119:9, 11). It gives us guidance in life, making us wiser than our teachers (Psalm 32:8, 119:99; Proverbs 1:6). The Bible keeps us from wasting years of our lives on that which does not matter and will not last (Matthew 7:24-27).
We recommend you find a Bible Reading Plan that you can start and finish in one year or less.