Ephesians 4:23 

And be renewed in the spirit of your mind.

Every day is new, and we need to build ourselves up for that day in the word. The time we spend reading and listening to the word of God helps renew our mind.  Reading the Bible will help change our attitudes and thoughts daily for the better.  Our brains need to focus on the word to stay on track and not get distracted by this cynical world.