The Second Law of Thermodynamics states that isolated systems must go in the direction of greater disorder. But an individual component of the system may become more ordered if a separate component or components increase even more in disorder.
Mortal living tends toward sin. The entire world is steadily becoming worse in this respect. It would be hopeless, except for the Savior who has taken all “sin entropy” on himself. An infinite amount of it. This permits us ~ an infinite number of us ~ to increase in order and goodness and glory, but only if we rely on His payment.
Thermodynamics is a tough subject to get your head around. So is the gospel’s idea of atonement, but luckily we have some great teachers.