Bringing a Bible to church does not make you a better Christian. But I found a list of several reasons why it is helpful to have a Bible with you. (From a sermon in January)

1. Bringing and using a Bible “shows the Bible is important to you, to the greater glory of God.” “For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.”
2. “It’s a testimony to your neighbors, who may see you carrying it Sunday morning. Further, it’s an example to others in your church, especially the children.”
3. “It prepares you to participate in the service, at times when the Scriptures are read.” In that sense, it is an act of corporate worship.

We learn in different ways. Auditory learners listen.  Visual learners look.  Most of us combine the senses.  Hearing and seeing increases the opportunity to learn.

4. “It allows you to underline or mark things in your Bible that will be helpful to you later.” And it helps you learn how to find your way through the pages.

Finally, here is a pastoral perspective that I strongly encourage you to consider. 

     5. Using your Bible during the preaching “enables you to check what the preacher is saying, as the Bereans did. “Now these Jews were more noble than those in Thessalonica; they received the word with all eagerness, examining the Scriptures daily to see if these things were so.”  These folks were double-checking the apostle Paul! They examined the Scripture to make sure what was preached was biblical.  You can do that, you should do that.  Don’t simply take the preacher’s word. Check to see that what is said is Bible-based.

(https://churchtechtoday.com/2011/08/22/5-reasons-bible-church/)