'Sincere' in the Bible

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.

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

so that you can decide what is best, and thus be sincere and blameless for the day of Christ,

Slaves, obey your earthly masters in every respect, not only when they are watching -- like those who are strictly people-pleasers -- but with a sincere heart, fearing the Lord.

But the aim of our instruction is love that comes from a pure heart, a good conscience, and a sincere faith.

I recall your sincere faith that was alive first in your grandmother Lois and in your mother Eunice, and I am sure is in you.

let us draw near with a sincere heart in the assurance that faith brings, because we have had our hearts sprinkled clean from an evil conscience and our bodies washed in pure water.

You have purified your souls by obeying the truth in order to show sincere mutual love. So love one another earnestly from a pure heart.