'Communication' in the Bible

I went up [to Jerusalem] because of a [divine] revelation, and I put before them the gospel which I preach among the Gentiles. But I did so in private before those of reputation, for fear that I might be running or had run [the course of my ministry] in vain.

Therefore, when we could no longer endure our separation [from you], we thought it best to be left behind, alone at Athens,