[editor-surveyor]

> “ but they don’t lay it out from scratch.”

.
Oh, but yes they do! - Absolutely everything is in the epistles.

The stuff that you are looking to as not included were the idolatry that that formed the foundation of the Roman Catholic Anti-church.
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[maryz]

Absolutely everything is in the epistles.

I think that's an utterly indefensible statement, plucked out of thin air. They are neither "everything" nor systematic theology.

[MarkBsnr]

“ but they don’t lay it out from scratch.”

. Oh, but yes they do! - Absolutely everything is in the epistles.

Negative. The letters from Paul are communications to his flock. The Gospels are the words and the deeds of Christ on Earth. Ummm, now what to choose - Christianity or Paulianity?