2 Corinthians 1:12

For our boast is this: the testimony of our conscience, that with holiness and godly sincerity, not in worldly wisdom but in the grace of God, we have conducted ourselves in the world, and still more toward you.

2 Corinthians 2:17

For we are not, like so many, peddling the word of God; but as men of sincerity, as from God, in the sight of God we speak in Christ.

1 Corinthians 2:13

This is what we speak, not in words taught us by human wisdom but in words taught by the Spirit, expressing spiritual truths in spiritual words.

Acts 23:1

And Paul, looking intently at the council, said, "Brethren, I have lived my life before God in all good conscience up to this day."

Acts 24:16

And so I do my best always to have a clear conscience before God and men.

2 Corinthians 4:2

But we have renounced secret and shameful ways; we do not use deception, nor do we distort the word of God. On the contrary, by setting forth the truth plainly we commend ourselves to every man's conscience in the sight of God.

Hebrews 13:18

Pray for us, for we are sure that we have a clear conscience, desiring to live honorably in all things.

James 3:13-18

Who is wise and understanding among you? By his good life let him show his deeds in the humility of wisdom.

Romans 9:1

I am speaking the truth in Christ, I am not lying; my conscience bears me witness in the Holy Spirit,

Romans 16:18-19

For such persons do not serve our Lord Christ, but their own appetites, and by smooth and flattering words they deceive the hearts of the simple.

1 Corinthians 2:4-5

and my message and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power,

1 Corinthians 4:4

I am not aware of anything against myself, but I am not acquitted by this. It is the Lord who judges me.

1 Corinthians 5:8

Let us, therefore, celebrate the festival, not with the old leaven, the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.

1 Corinthians 15:10

But by the grace of God I am what I am, and his grace toward me was not in vain. No, I worked harder than all of themyet not I, but the grace of God that was with me.

2 Corinthians 1:17

When I was planning this, did I do it lightly? Or do I make my plans in a fleshly manner so that in the same breath I say, "Yes, Yes" and "No, No"?

2 Corinthians 8:8

I am not speaking this as a command, but I want to test the sincerity of your love by comparing it with the earnestness of others.

2 Corinthians 10:2-4

I beg you that when I am present I may not have to be bold with that confidence by which I intend to be bold against some, who think of us as if we walked according to the flesh.

2 Corinthians 11:3

But I am afraid that just as the serpent deceived Eve by his cunning, your minds may somehow be led astray from your sincere and pure devotion to Christ.

2 Corinthians 12:15-19

I will most gladly spend and be spent for your souls. If I love you the more, am I to be loved the less?

Galatians 6:4

But let each one test his own work, and then he will have reason to boast in himself alone, and not in his neighbor.

Ephesians 6:14

Stand firm therefore, having girded your loins with truth, and having put on the breastplate of righteousness,

Philippians 1:10

so that you may approve what is excellent, and may be pure and blameless until the day of Christ;

1 Thessalonians 2:10

You are witnesses, and God also, how holy and righteous and blameless we behaved toward you believers;

1 Timothy 1:5

But the goal of our instruction is love from a pure heart and a good conscience and a sincere faith.

1 Timothy 1:19-20

holding faith and a good conscience, which some have rejected and made shipwreck of their faith.

Titus 2:7

Show yourself in all respects an example of good deeds, and in your teaching show integrity, seriousness,

James 4:6

But he gives more grace. Therefore it says, "God opposes the proud, but gives grace to the humble."

1 Peter 3:16

and keep a clear conscience, so that, when you are abused, those who revile your good behavior in Christ may be put to shame.

1 Peter 3:21

And corresponding to that, baptism now saves younot the removal of dirt from the flesh, but an appeal to God for a good consciencethrough the resurrection of Jesus Christ,

1 John 3:19-22

By this we know that we are of the truth, and shall assure our hearts before him

Treasury of Scripture Knowledge

Summary

For 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.

Bible References

Our rejoicing

Acts 24:16
And so I do my best always to have a clear conscience before God and men.
Romans 9:1
I am speaking the truth in Christ, I am not lying; my conscience bears me witness in the Holy Spirit,
1 Corinthians 4:4
I am not aware of anything against myself, but I am not acquitted by this. It is the Lord who judges me.
Galatians 6:4
But let each one test his own work, and then he will have reason to boast in himself alone, and not in his neighbor.
1 Timothy 1:5
But the goal of our instruction is love from a pure heart and a good conscience and a sincere faith.
Hebrews 13:18
Pray for us, for we are sure that we have a clear conscience, desiring to live honorably in all things.
1 Peter 3:16
and keep a clear conscience, so that, when you are abused, those who revile your good behavior in Christ may be put to shame.
1 John 3:19
By this we know that we are of the truth, and shall assure our hearts before him

Simplicity

2 Corinthians 11:3
But I am afraid that just as the serpent deceived Eve by his cunning, your minds may somehow be led astray from your sincere and pure devotion to Christ.
Romans 16:18
For such persons do not serve our Lord Christ, but their own appetites, and by smooth and flattering words they deceive the hearts of the simple.

General references

Acts 24:16
And so I do my best always to have a clear conscience before God and men.
2 Corinthians 6:3
We put no stumbling block in anyone's path, so that our ministry will not be discredited.
1 John 3:21
Beloved, if our hearts do not condemn us, we have confidence before God;