When my children were infants, my wife and I gave them milk. As they grew older, we fed them soft food. They looked as happy as the plump babies pictured on the baby-food jars.
Our children are adults now. When they come to visit, my wife fixes them food like steak and potatoes. They've grown up.
Milk and baby food are great for babies. As they mature, however, they should go on to solid food. The same is true about spiritual growth.
Maturing as a Christian can also be compared to becoming a concert pianist. In a sense, you are a pianist from the moment you play your first simple piece. Yet it takes years of practice to play the piano well. You'll never be a concert pianist if you don't advance beyond the easy compositions.
The writer to the Hebrews was concerned about the lack of spiritual growth among his readers. He wrote, "By this time you ought to be teachers." Then he observed, "You have come to need milk and not solid food" (5:12). He urged them to "go on to perfection" in their faith (6:1).
Christians should move on to spiritual maturity. We must feast on the meat of God's Word and put into practice the lessons we have learned. It's the only way to grow up. — Haddon W. Robinson
More about Jesus let me learn,
More of His holy will discern;
Spirit of God, my teacher be,
Showing the things of Christ to me. —Hewitt
The new birth takes but a moment; spiritual maturity takes a lifetime.