When we calculate in math we seek to determine the value of things. We add, subtract, and multiply things in order to figure out how much there is. God wants you to calculate what is more valuable, and what truly has worth; but He is not looking for you to have the power in yourself to carry the math out. He alone can cleanse you of your idols and save you. The true Christian is the most logical person in the world because by faith he has done the math right and calculated correctly and found Christ more valuable than everything.