"Unskillful in the word of righteousness" will be easily seen to be a fit expression, as used by the Spirit in the epistle to the Hebrews. There was need of rebuke and encouragement from the Lord to those who were addressed. They were resting satisfied with certain elementary truths with regard to Christ. The Spirit would condemn this resting satisfied with such. They should go on to know Christ in glory, and all that flowed from the knowledge of Him there, and the results to them; in other words, to "go on to perfection." The very absence of such progress causes him to raise the solemn, warning words of the early part of Heb. 6, knowing that retrogression in spiritual things may lead to their surrender and the sad discovery that he who once held them, did so but to his own destruction, because only intellect and mind were at work, and no true quickening of the soul was there.
He would encourage the feeblest living one, and warn the most instructed professor, filling the one with "strong consolation," and telling the other that, having made known the blessed truths of Christianity, God had no more to reveal, for He Himself was known, and His Spirit given to carry down the blessed things of Christ from heaven to earth, during His absence. If such were only used by intellect, and no living faith at work in the soul, "it is impossible... to renew them again unto repentance."
You may check your answers with those given on page 45.
Why did Nehemiah give his brother Hanani (together with another man) charge over Jerusalem?
What commendation did the Apostle Paul give Timotheus when writing to the Philippians?
What did the same Apostle say about Onesiphorus?
How were the saints benefited by Philemon?