Let all your discussions be from the holy Writings

Reasoning by the word

And Paul, as he generally did, went in to them, and on three Sabbath days had discussions with them from the holy Writings,
Acts 17:2

Saying to them clearly and openly that Christ had to be put to death and come back to life again; and that this Jesus, whom, he said, I am preaching to you, is the Christ.
Acts 17:3