'Sincerity' in the Bible

Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, and in Egypt; and serve ye the LORD.

And, now, if in truth and in sincerity ye have acted, when ye make Abimelech king; and if ye have done good with Jerubbaal, and with his house; and if according to the deed of his hands ye have done to him --

yea, if in truth and in sincerity ye have acted with Jerubbaal and with his house this day, rejoice ye in Abimelech, and he doth rejoice -- even he -- in you;

He prayed: "O Lord, God of Israel, there is no god like you in heaven above or on earth below! You maintain covenantal loyalty to your servants who obey you with sincerity.

You must serve me with integrity and sincerity, just as your father David did. Do everything I commanded and obey my rules and regulations.

and prayed: "O Lord God of Israel, there is no god like you in heaven or on earth! You maintain covenantal loyalty to your servants who obey you with sincerity.

My words come from my upright heart,and my lips speak with sincerity what they know.

The Lord dealt with me according to my righteousness (moral character, spiritual integrity);According to the cleanness of my hands He has rewarded me.

He who walks righteously and speaks with sincerity,He who rejects unjust gainAnd shakes his hands so that they hold no bribe;He who stops his ears from hearing about bloodshedAnd shuts his eyes from looking upon evil;

“Hear this, O house of Jacob, you who are called by the name of IsraelAnd who come from the seed of Judah,You who swear [allegiance] by the name of the LordAnd invoke the God of Israel,But not in truth (sincerity) nor in righteousness [with moral and spiritual integrity].

In spite of all this, Israel's sister, unfaithful Judah, has not turned back to me with any sincerity; she has only pretended to do so," says the Lord.

“Roam back and forth through the streets of Jerusalem,And look now and take note.And look in her open squaresTo see if you can find a man [as Abraham sought in Sodom],One who is just, who [has integrity and moral courage and] seeks truth (faithfulness);Then I will pardon Jerusalem—[for the sake of one uncompromisingly righteous person].

Day by day continuing with one mind in the temple, and breaking bread from house to house, they were taking their meals together with gladness and sincerity of heart,

if it is exhortation, he must exhort; if it is contributing, he must do so with sincerity; if it is leadership, he must do so with diligence; if it is showing mercy, he must do so with cheerfulness.

Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.

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.

For 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.

We are not again commending ourselves to your favour, but are furnishing you with a ground of boasting on our behalf, so that you may have a reply ready for those with whom superficial appearances are everything and sincerity of heart counts for nothing.

I speak not by commandment, but by occasion of the forwardness of others, and to prove the sincerity of your love.

But I am afraid lest somehow, as the serpent deceived Eve by his craftiness, your minds may be led astray from the sincerity and the purity of [devotion] to Christ.

And our prayer to God is that you may do nothing wrong; not in order that our sincerity may be demonstrated, but that you may do what is right, even though our sincerity may seem to be doubtful.

Slaves, obey your human masters with fear and trembling, in the sincerity of your heart, as to Christ.

Grace be with all them that love our Lord Jesus Christ in sincerity. Amen.

Slaves, in all things obey those who are your masters on earth, not with external service, as those who merely please men, but with sincerity of heart, fearing the Lord.

In all things shewing thyself a pattern of good works: in doctrine shewing uncorruptness, gravity, sincerity,

And we desire for each one of you to show the same diligence [all the way through] so as to realize and enjoy the full assurance of hope until the end,

let us draw near with sincerity and unfaltering faith, having had our hearts sprinkled, once for all, from consciences oppressed with sin, and our bodies bathed in pure water.

Little children (believers, dear ones), let us not love [merely in theory] with word or with tongue [giving lip service to compassion], but in action and in truth [in practice and in sincerity, because practical acts of love are more than words].

Grace, mercy, and peace (inner calm, a sense of spiritual well-being) will be with us, from God the Father and from Jesus Christ, the Father’s Son, in truth and love.

For I was greatly pleased when [some of the] brothers came [from time to time] and testified to your [faithfulness to the] truth [of the gospel message], that is, how you are walking in truth.