First Principles - Hebrews 5:11-6:3

After briefly exegeting the superiority of Christ's priesthood over the Old Covenant priesthood, the author of Hebrews expresses an interested to continue but points out the fact that many of his hearers do not have the spiritual maturity to be able to comprehend. He says they have become dull of hearing and essentially should be to a spiritual state of maturity. What does my own development look like spiritually? Am I still a baby or am I going on to maturity? Am I stuck on milk or am I moving on to solid food?