Many passages are so full of riches that it is helpful to just focus on a few verses. These four verses have foundational truth that is very much needed to set many Preterists back on the straight and narrow. Here we have, once again, essential saving doctrine. Not to believe these is to be outside of the faith.
Article linked below.
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Article linked below.

Col. 1:19-22: Saved Through the Blood of the Cross
“For it was the good pleasure of the Father that in him should all the fulness dwell; and through him to reconcile all things unto himself, having made peace through the blood of his cross; t…