2 Cor. 2:17. But we preach sincerely, as from God, before God, in Christ.
That is, we speak from a pure mind incapable of deceit, and as having received what we say from God, not as something accomplished by us. "In Christ" – not from our own wisdom, but inspired by His power; and he said "before God" to show the uprightness and openness of heart: our heart is so pure that we lay it open before God.