You may be totally oblivious to the tremendous maturing process taking place inside you. Paul likens our spiritual growth to the growth of our bodies. He says our souls are nourished in the same way as our physical joints, muscles and fibers. He calls this being “[increased] with the increase of God” (Colossians 2:19).
Such growth comes from the Head. Simply put, as you trust and abide in Christ, a never-ending flow of His life is pumped into your soul. Jesus is a constant life-force in your being, a living stream that never shuts down. Therefore, His life is constantly emanating into yours, even while you are sleeping. He provides a fresh supply to you every day, no matter how you feel on the outside.
How do you think Israel survived forty years in the wilderness? They lived on manna, bread sent from heaven. This “angels’ food” had all the nutrients needed to build up the Israelites’ immune systems. That is why God’s people never contracted any of the diseases of Egypt. All around them, the Canaanites and Philistines were dying of plagues, yet the whole time, Israel remained immune.
So it is with Christ, our manna today. He is the bread sent to us from heaven and He builds up our spiritual immune systems against sins of all kinds. We may not see outward signs that this manna is at work in us (just as we don’t see our physical bodies’ immune systems growing stronger). But God’s Word promises that all who love Jesus will grow stronger in their spiritual immunity. Think about it: At times you still may be tempted, but over the years you’ve found growing power to resist the world’s seductions. And you’ve grown more disgusted with the filth you see around you. You no longer think or talk as the world does. While your coworkers are howling, “It’s Friday—party time,” you’re thinking, “Only two more days till Sunday.” That’s because you are growing!