George Leo Haydock

Of whom, i.e. of his high priesthood, according to the order of Melchisedech, we have mighty things to say, and very hard to be expounded or understood by you, at least many of you, who, though you ought to be masters after the gospel hath been so long preached, and even by the apostles of Christ, yet you are weak as to understanding it; (the Greek also signifies slothful and negligent) you stand in need of being taught the first elements and principles of the Christian faith, like children, who are rather to be fed with milk than with more solid meats. How many are there now in the like condition, who are for reading and expounding all the holy Scriptures according to their own way of thinking? (Witham)