2 Cor. 4:1-4 (ESV)
Therefore, having this ministry by the mercy of God, we do not lose heart.  But we have renounced disgraceful, underhanded ways. We refuse to practice cunning or to tamper with God's word, but by the open statement of the truth we would commend ourselves to everyone's conscience in the sight of God.  And even if our gospel is veiled, it is veiled only to those who are perishing.  In their case the god of this world has blinded the minds of the unbelievers, to keep them from seeing the light of the gospel of the glory of Christ, who is the image of God.
We refuse to practice cunning or tamper with God’s word. All should take this to heart. No gimmicks in church, just the plain word of God. We do not ignore parts of it to make it politically correct. God’s word is Holy, if it is hard to swallow, then we need to repent. Our ways are not God’s ways. We might not always know every reason for which God forbids or allows something, but we do not have the right to change it. Tampering with God’s word is never justified. It may fill a church building, but it does not add a soul to the church, for the church is made of those who hear the voice of their shepherd and listen to it. Paul is clear about what we are to do. We are to proclaim the word of God as an open statement of truth. It is not right to hide God’s word, or aspects of God’s word. We need to be open with it. This is true both of his law, and his Gospel. But most important is that we proclaim the Gospel, the forgiveness of sins in the death and resurrection of Jesus, openly. So that even those blinded by the god of this world, are confronted with the truth of Jesus Christ, who is the image of God.