Emphasis on always talking.
The Church decided on the Trinity before a solid canon of Scripture was settled upon. This should tell one how important it was to them.
The early church had a pre-theoretical, experiential embracing of the triune God. They worshipped Jesus as God, considered the Holy Spirit God/personal, affirmed monotheism, etc. The revelation was progressive from the OT and the nuanced understanding, like other doctrines, growing over time under the Spirit's leading and out of necessity in response to later heretical attacks like Oneness and Arianism. As AMR points out, there were many doctrine of God, Christology, incarnation heresies already dealt with. Most modern ones are rehashes with new twists that fall to the same refutations.