Sincerity: should Characterise: The Preaching of the Gospel
Source: TTT
2 Corinthians 2:17
For we are not like so many others, who peddle the word of God for profit. On the contrary, in Christ we speak before God with sincerity, as men sent from God.
1 Thessalonians 2:3–5
For our appeal does not arise from deceit or ulterior motives or trickery. / Instead, we speak as those approved by God to be entrusted with the gospel, not in order to please men but God, who examines our hearts. / As you know, we never used words of flattery or any pretext for greed. God is our witness!