Romans 12:2

And do not be conformed to this world (any longer with its superficial values and customs), but be transformed and progressively changed (as you mature spiritually) by the renewing of your mind (focusing on godly values and ethical attitudes), so that you may prove what the will of God is, that which is good and acceptable and perfect. 

The mind won’t stay renewed without time spent in the word. Our goal should be stability and a strong foundation based on our knowledge of Jesus. The world is a constantly changing opinion and not necessarily in a Godly direction. We need God’s help, strength, and comfort to lead us daily.