2 Cor 1:12
...our rejoicing is this, the testimony of our conscience, that in simplicity and godly sincerity , not with fleshly wisdom, but by the grace of God, we have had our conversation in the world, and more abundantly to you-ward.
2 Cor 2:17
...we are not as many, which corrupt the word of God: but as of sincerity , but as of God, in the sight of God speak we in Christ.
...that ye may approve things that are excellent; that ye may be sincere and without offence till the day of Christ;
being filled with the fruits of righteousness, which are by Jesus Christ, unto the glory and praise of God.
...some indeed preach Christ even of envy and strife; and some also of good will:
the one preach Christ of contention, not sincerely...
1 Peter 2:2-3
As newborn babes, desire the sincere milk of the word, that ye may grow thereby:
if so be ye have tasted that the Lord is gracious.