His business is not merely what we do; it is what we are.  It is not just avoiding bad thoughts; it is to have our thinking so changed that goodness flows out of pure thoughts, untainted by self-serving intent or motives.  If you want a deeper life, then get away from shallow thinking.   Through communion with our Lord we can stop thinking the way the culture thinks and think like citizens of another kingdom think; out of His ways of thinking we find another way of living, acting and being in the world.

“Don’t copy the behavior and customs of this world, but let God transform you into a new person by changing the way you think. Then you will learn to know God’s will for you, which is good and pleasing and perfect.” Romans 12:2 (NLT)