Everyone experiences measures of stress. Just as the stress of resistance in weight training builds strong muscles, a certain amount of stress increases strength in our mental and spiritual capacities. But when we live under constant stress, we may feel tired even when there is no apparent reason. Sometimes, we may experience no feelings at all-just a sense of numbness. We may become reactionary, angry, anxious, defensive, or troubled. The body works harder when there is an imbalance in the system.
A person may try to rest, but to no avail. He may try to cover up his old sin nature, but he can't. All of this happens because the Word and the Spirit are not controlling his central nervous system and the cells of his body. The imbalance is revealed in his behavior, which is mostly reactionary and in the flesh.
But when we receive the Word of God with meekness and allow it to be engrafted into our souls (James 1:21), then our cells can develop connections that respond to the mind of Christ immediately and to the power of the life of Christ consistently. New lines and new habits are established through the energy of God.