In fact, though by this time you ought to be teachers, you need someone to teach you the elementary truths of God's word all over again. You need milk, not solid food!
NIV
For even though by this time you ought to be teaching others, you actually need someone to teach you over again the very first principles of God's Word. You have come to need milk, not solid food.
AMP
For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.
KJV
During the days of Jesus' life on earth, he offered up prayers and petitions with fervent cries and tears to the one who could save him from death, and he was heard because of his reverent submission.
NIV
In the days of His flesh [Jesus] offered up definite, special petitions [for that which He not only wanted but needed] and supplications with strong crying and tears to Him Who was [always] able to save Him [out] from death, and He was heard because of His reverence toward God [His godly fear, His piety, in that He shrank from the horrors of separation from the bright presence of the Father].
AMP
Who in the days of his flesh, when he had offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and was heard in that he feared;
KJV
But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.
NIV
But solid food is for full-grown men, for those whose senses and mental faculties are trained by practice to discriminate and distinguish between what is morally good and noble and what is evil and contrary either to divine or human law.
AMP
But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
KJV
And, once made perfect, he became the source of eternal salvation for all who obey him
NIV
And, [His completed experience] making Him perfectly [equipped], He became the Author and Source of eternal salvation to all those who give heed and obey Him, [Isa. 45:17.]AMP
And being made perfect, he became the author of eternal salvation unto all them that obey him;
KJV
We have much to say about this, but it is hard to make it clear to you because you no longer try to understand.
NIV
Concerning this we have much to say which is hard to explain, since you have become dull in your [spiritual] hearing and sluggish [even slothful in achieving spiritual insight].
AMP
Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing.
KJV
He is able to deal gently with those who are ignorant and are going astray, since he himself is subject to weakness.
NIV
He is able to exercise gentleness and forbearance toward the ignorant and erring, since he himself also is liable to moral weakness and physical infirmity.
AMP
Who can have compassion on the ignorant, and on them that are out of the way; for that he himself also is compassed with infirmity.
KJV