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Those responsible for preaching must renew their preaching
by drinking in the waters of the original proclamation of the Apostles.
Only then will we be able to rescue the sense of our sinfulness and with it,
the right understanding of the realities of Death, Heaven, Hell, and Purgatory.

I would amend that from "the Apostles" to Y'shua
( YHvH is our salvation) and following G-d's Law as Y'shua us commanded in

John 14:15 "If you love Me, you will keep My commandments.

b'shem Y'shua

First, recurring to Hebrew expressions to justify doctrinal positions does not necessarily lead to authentic statements of Christian belief. There's no need to Hebraize everything to make a doctrinal point. Regarding the appeal to "the Apostles," these quotes are also relevant:

"Before we go much further, let us define what is meant by khrugma. Kerygma is a Greek noun meaning a “message” or a “proclamation.” Attic Greek used the word especially in relation to “a herald or public crier” and that it implies a carrier of the message – the Apostles in the case of the New Testament[1]. It is public in nature; Pershbacher uses the phrases “public annunciation” and “public inculcation” in his definition. Arndt & Gingrich underscore the aspect of preaching, and this is in accordance with English translations of the Bible: the KJV, NAS, and NIV render kerygma as “preaching” 83% of the time. Although kerygma means generically a proclamation of any sort, in the New Testament it is always used to describe the Gospel. (Source, emphasis mine)

Also,

Paul himself at least believed that in essentials his Gospel was that of the primitive apostles; for although in Gal. i. ii-i8 he states with emphasis that he did not derive it from any human source, nevertheless in the same epistle (ii. z) he says that he submitted "the Gospel which I preach" to Peter, James and John at Jerusalem, and that they gave their approval. Not only so, but in the locus classicus, i Cor. xv. i sqq., he expressly declares that this summary of the Gospel is what he had "received" as tradition; and after referring to other witnesses to the facts, including Peter, James, and "all the apostles," he adds with emphasis, "Whether I or they, it was thus that we preached, and thus that you believed." (Source)

Thus, the reference to "the Apostles" is completely consistent with the New Testament. It is always understood that the Good News originated from Jesus. The authors of the New Testament granted their audience that much common sense. The New Testament was not written to justify the Good News of Jesus, but to proclaim them, and to demonstrate the authority of the Apostles and their successors to preach them.

-Theo