"Children, don't let anyone deceive you -- it is the person that keeps on doing what is right who is righteous, just as God is righteous. The person who keeps on sinning is from the Adversary, because from the very beginning the Adversary has kept on sinning." [1st John 3:1, 8]
"Let this mind be in you which was is in Christ Jesus." [ Phil. 2:5]
"Therefore gird up the loins of your mind, be sober, and rest your hope fully upon the grace that is to be brought to you at the revelation of Jesus Christ;" [1st Peter 1:13]
"Examine me, O LORD, and prove me; Try my mind and my heart." [Psalms 26:2]
"And you shall love the LORD your God with all your heart, with all your soul, with all your mind, and with all your strength.' This is the first commandment." [Mark 12:30]
"And do not seek what you should eat or what you should drink, nor have an anxious mind." [Luke 12:29]
"And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God." [Romans 12:2]
Post script: each of these texts presents an opportunity to exercise our mind by memorization and contemplation. By learning Bible texts we can carry (some of) the Bible where ever we go.e.c.