'Sincere' in the Bible
All these, being men of war arrayed in battle order, came with a perfect and sincere heart to Hebron to make David king over all Israel; and all the rest also of Israel were of one mind to make David king.
Give sincere homage! Otherwise he will be angry, and you will die because of your behavior, when his anger quickly ignites. How blessed are all who take shelter in him!
For their hearts were not right or sincere with Him, neither were they faithful and steadfast to His covenant.
Blessed (happy, fortunate, to be envied) are the undefiled (the upright, truly sincere, and blameless) in the way [of the revealed will of God], who walk (order their conduct and conversation) in the law of the Lord (the whole of God's revealed will).
I will praise You with a sincere heart when I learn Your righteous judgments.
Let my heart be sound (sincere and wholehearted and blameless) in Your statutes, that I may not be put to shame.
Ointment and incense make the heart rejoice, likewise the sweetness of one's friend from sincere counsel.
The one who walks righteously and has spoken sincere words, who rejects gain from extortion and waves his hand, rejecting bribes, who blocks his ears from hearing plots of murder and shuts his eyes against seeing evil
The lamp of the body is the eye: if therefore thine eye is sincere, thy whole body shall be full of light.
They sent their disciples to him along with the Herodians. They said, "Teacher, we know that you are sincere and that you teach the way of God truthfully. You don't favor any individual, because you pay no attention to external appearance.
They came and told him, "Teacher, we know that you are sincere. You don't favor any individual, because you pay no attention to external appearance. Rather, you teach the way of God truthfully. Is it lawful to pay taxes to Caesar or not? Should we pay them or shouldn't we?"
The lamp of the body is the eye; therefore when thine eye is sincere, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.
Then they watched him carefully and sent spies who pretended to be sincere. They wanted to take advantage of what he might say so that they could deliver him up to the authority and jurisdiction of the governor.
[Let your] love be sincere (a real thing); hate what is evil [loathe all ungodliness, turn in horror from wickedness], but hold fast to that which is good.
So let's keep celebrating the festival, neither with old yeast nor with yeast that is evil and wicked, but with yeast-free bread that is both sincere and true.
My love (that true love growing out of sincere devotion to God) be with you all in Christ Jesus. Amen (so be it).
by purity, by knowledge, by patience, by kindness, by the Holy Spirit, by sincere love,
However, I am afraid that just as the serpent deceived Eve by its tricks, so your minds may somehow be lured away from sincere and pure devotion to the Messiah.
That ye may approve things that are excellent; that ye may be sincere and without offence till the day of Christ;
Slaves, obey your earthly masters in everything, not only while being watched in order to please them, but with a sincere heart, fearing the Lord.
Now the goal of our instruction is love from a pure heart, a good conscience, and a sincere faith.
In like manner the deacons [must be] worthy of respect, not shifty and double-talkers but sincere in what they say, not given to much wine, not greedy for base gain [craving wealth and resorting to ignoble and dishonest methods of getting it].
clearly recalling your sincere faith that first lived in your grandmother Lois, then in your mother Eunice, and that I am convinced is in you also.
let us continue to come near with sincere hearts in the full assurance that faith provides, because our hearts have been sprinkled clean from a guilty conscience, and our bodies have been washed with pure water.
By obedience to the truth, having purified yourselves for sincere love of the brothers, love one another earnestly from a pure heart,
As newborn babes, desire the sincere milk of the word, that ye may grow thereby: